Create uv.lock

Heroku needs this otherwise build fails

```
stalling libspecio-perl_0.48-1_all.deb
-----> Installing libsub-exporter-perl_0.990-1_all.deb
-----> Installing libsub-exporter-progressive-perl_0.001013-3_all.deb
-----> Installing libsub-identify-perl_0.14-3build3_amd64.deb
-----> Installing libsub-install-perl_0.929-1_all.deb
-----> Installing libsub-name-perl_0.27-1build3_amd64.deb
-----> Installing libsub-quote-perl_2.006008-1ubuntu1_all.deb
-----> Installing libsvn1_1.14.3-1build4_amd64.deb
-----> Installing libsvn-perl_1.14.3-1build4_amd64.deb
-----> Installing libtcl8.6_8.6.14+dfsg-1build1_amd64.deb
-----> Installing libterm-readkey-perl_2.38-2build4_amd64.deb
-----> Installing libtimedate-perl_2.3300-2_all.deb
-----> Installing libtk8.6_8.6.14-1build1_amd64.deb
-----> Installing libtry-tiny-perl_0.31-2_all.deb
-----> Installing libtypes-serialiser-perl_1.01-1_all.deb
-----> Installing liburi-perl_5.27-1_all.deb
-----> Installing libutf8proc3_2.9.0-1build1_amd64.deb
-----> Installing libvariable-magic-perl_0.63-1build3_amd64.deb
-----> Installing libwww-perl_6.76-1_all.deb
-----> Installing libwww-robotrules-perl_6.02-1_all.deb
-----> Installing libxft2_2.3.6-1build1_amd64.deb
-----> Installing libxss1_1%3a1.2.3-1build3_amd64.deb
-----> Installing libxstring-perl_0.005-2build3_amd64.deb
-----> Installing libyaml-libyaml-perl_0.89+ds-1build2_amd64.deb
-----> Installing libyaml-libyaml-perl_0.89+ds-1ubuntu0.24.04.1_amd64.deb
-----> Installing libyaml-perl_1.31-1_all.deb
-----> Installing perl-openssl-defaults_7build3_amd64.deb
-----> Installing ssl-cert_1.1.2ubuntu1_all.deb
-----> Installing tcl_8.6.14build1_amd64.deb
-----> Installing tcl8.6_8.6.14+dfsg-1build1_amd64.deb
-----> Installing tk_8.6.14build1_amd64.deb
-----> Installing tk8.6_8.6.14-1build1_amd64.deb
-----> Writing profile script
-----> Exporting environment
-----> Rewrite package-config files
-----> Setting GIT_EXEC_PATH to /tmp/build_8aa651b7/.apt/usr/lib/git-core
-----> Python app detected
 !     Error: Couldn't find any supported Python package manager files.
 !     
 !     A Python app on Heroku must have either a 'requirements.txt',
 !     'Pipfile.lock', 'poetry.lock' or 'uv.lock' package manager file
 !     in the root directory of its source code.
 !     
 !     Currently the root directory of your app contains:
 !     
 !     .apt/
 !     Aptfile
 !     assets/
 !     CITATION.cff
 !     docker/
 !     docker-compose.yml
 !     docs/
 !     examples/
 !     .github/
 !     .gitignore
 !     k8s/
 !     LICENSE
 !     .pre-commit-config.yaml
 !     Procfile
 !     .profile.d/
 !     pyproject.toml
 !     README.md
 !     .ruff.toml
 !     runtime.txt
 !     scripts/
 !     src/
 !     unit-tests/
 !     
 !     If your app already has a package manager file, check that it:
 !     
 !     1. Is in the top level directory (not a subdirectory).
 !     2. Has the correct spelling (the filenames are case-sensitive).
 !     3. Isn't listed in '.gitignore' or '.slugignore'.
 !     4. Has been added to the Git repository using 'git add --all'
 !        and then committed using 'git commit'.
 !     
 !     Otherwise, add a package manager file to your app. If your app has
 !     no dependencies, then create an empty 'requirements.txt' file.
 !     
 !     If you aren't sure which package manager to use, we recommend
 !     trying uv, since it supports lockfiles, is extremely fast, and
 !     is actively maintained by a full-time team:
 !     https://docs.astral.sh/uv/
 !     
 !     For help with using Python on Heroku, see:
 !     https://devcenter.heroku.com/articles/getting-started-with-python
 !     https://devcenter.heroku.com/articles/python-support
 !     Push rejected, failed to compile Python app.
 !     Push failed
```

Author: msaroufim