Add a panel accessor class for streamlit scripts to call #109

Job	Run time
Run CI / Check nipanel / Check nipanel	45s
Run CI / Check docs / Check docs	39s
Run CI / Run unit tests / Run unit tests (windows-latest, 3.10)	1m 4s
Run CI / Run unit tests / Run unit tests (ubuntu-latest, 3.10)	30s
Run CI / Run unit tests / Run unit tests (windows-latest, 3.9)	49s
Run CI / Run unit tests / Run unit tests (ubuntu-latest, 3.9)	32s
Run CI / Run unit tests / Run unit tests (windows-latest, 3.11)	52s
Run CI / Run unit tests / Run unit tests (windows-latest, 3.12)	48s
Run CI / Run unit tests / Run unit tests (windows-latest, 3.13)	9m 58s
Run CI / Run unit tests / Run unit tests (ubuntu-latest, 3.11)	27s
Run CI / Run unit tests / Run unit tests (ubuntu-latest, 3.12)	25s
Run CI / Run unit tests / Run unit tests (ubuntu-latest, 3.13)	6m 43s
Run CI / Report test results / Report test results	25s
	23m 57s

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