Fix documentation warnings relative to glossary and notations

[NicolasGensollen]

They appear towards the end of the logs:

/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:15: WARNING: 'myst' cross-reference target not found: 'likelihood'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:25: WARNING: 'myst' cross-reference target not found: 'fixed-effects-model'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:25: WARNING: 'myst' cross-reference target not found: 'likelihood'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:25: WARNING: 'myst' cross-reference target not found: 'mcmc-saem'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:30: WARNING: 'myst' cross-reference target not found: 'personalization'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:34: WARNING: 'myst' cross-reference target not found: 'random-effects-model'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:34: WARNING: 'myst' cross-reference target not found: 'mixed-model'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:47: WARNING: 'myst' cross-reference target not found: 'attachment'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:48: WARNING: 'myst' cross-reference target not found: 'regularity'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:59: WARNING: 'myst' cross-reference target not found: 'likelihood'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:63: WARNING: 'myst' cross-reference target not found: 'fixed-effects-model'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:63: WARNING: 'myst' cross-reference target not found: 'random-effects-model'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:67: WARNING: 'myst' cross-reference target not found: 'space-shifts'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:67: WARNING: 'myst' cross-reference target not found: 'space-shifts'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:67: WARNING: 'myst' cross-reference target not found: 'sources'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:82: WARNING: 'myst' cross-reference target not found: 'fixed-effects-model'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:82: WARNING: 'myst' cross-reference target not found: 'random-effects-model'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:82: WARNING: 'myst' cross-reference target not found: 'estimation'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:86: WARNING: 'myst' cross-reference target not found: 'mixed-model'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:91: WARNING: 'myst' cross-reference target not found: 'likelihood'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:96: WARNING: 'myst' cross-reference target not found: 'overfitting'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:101: WARNING: 'myst' cross-reference target not found: 'mixing-matrix'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:101: WARNING: 'myst' cross-reference target not found: 'space-shifts'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:101: WARNING: 'myst' cross-reference target not found: 'random-effects-model'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:106: WARNING: 'myst' cross-reference target not found: 'space-shifts'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/glossary.md:110: WARNING: 'myst' cross-reference target not found: 'spatial-effects'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/index.md:52: WARNING: 'myst' cross-reference target not found: './nutshell.md'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/index.md:56: WARNING: local id not found in doc 'glossary': 'api'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/index.md:56: WARNING: local id not found in doc 'glossary': 'api'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/install.md:76: WARNING: 'myst' cross-reference target not found: './nutshell.md'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/mathematics.md:13: WARNING: local id not found in doc 'notations': 'individual-trajectory'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/mathematics.md:39: WARNING: local id not found in doc 'notations': 'individual-trajectory'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/mathematics.md:43: WARNING: local id not found in doc 'notations': 'estimated-reference-time'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/mathematics.md:45: WARNING: local id not found in doc 'notations': 'individual-speed-factor'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/mathematics.md:45: WARNING: local id not found in doc 'notations': 'individual-speed-factor'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/mathematics.md:53: WARNING: local id not found in doc 'notations': 'space-shift'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/notations.md:: WARNING: 'myst' cross-reference target not found: 'estimated-reference-time'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/notations.md:: WARNING: 'myst' cross-reference target not found: 'individual-log-speed-factor'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/notations.md:: WARNING: 'myst' cross-reference target not found: 'individual-trajectory'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/notations.md:: WARNING: 'myst' cross-reference target not found: 'latent-disease-age'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/notations.md:: WARNING: 'myst' cross-reference target not found: 'mixing-matrix'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/notations.md:: WARNING: 'myst' cross-reference target not found: 'population-reference-time'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/notations.md:: WARNING: 'myst' cross-reference target not found: 'sources'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/notations.md:: WARNING: 'myst' cross-reference target not found: 'space-shift'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/notations.md:: WARNING: 'myst' cross-reference target not found: 'survival-shift'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/notations.md:49: WARNING: 'myst' cross-reference target not found: 'individual-speed-factor'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/notations.md:50: WARNING: 'myst' cross-reference target not found: 'estimated-reference-time'
/Users/nicolas.gensollen/GitRepos/leaspy/docs/notations.md:51: WARNING: 'myst' cross-reference target not found: 'population-reference-time'

[NicolasGensollen]

Also:

/Users/nicolas.gensollen/GitRepos/leaspy/src/leaspy/models/constant.py:docstring of leaspy.models.constant.ConstantModel:4: WARNING: term not in glossary: 'calibration'
/Users/nicolas.gensollen/GitRepos/leaspy/src/leaspy/models/constant.py:docstring of leaspy.models.constant.ConstantModel:9: WARNING: term not in glossary: 'calibration'
/Users/nicolas.gensollen/GitRepos/leaspy/src/leaspy/models/constant.py:docstring of leaspy.models.constant.ConstantModel:10: WARNING: term not in glossary: 'calibration'
/Users/nicolas.gensollen/GitRepos/leaspy/src/leaspy/models/constant.py:docstring of leaspy.models.constant.ConstantModel:11: WARNING: term not in glossary: 'calibration'
/Users/nicolas.gensollen/GitRepos/leaspy/src/leaspy/models/constant.py:docstring of leaspy.models.constant.ConstantModel:39: WARNING: term not in glossary: 'personalization'
/Users/nicolas.gensollen/GitRepos/leaspy/src/leaspy/models/constant.py:docstring of leaspy.models.constant.ConstantModel:47: WARNING: term not in glossary: 'personalization'

[KaisaridiSofia]

@MendezSebastianP is this still a problem after your recent fixes?

[MendezSebastianP]

everything fixed and documented in #483