Run tests in CI and distribute package

This MR does 2 things:

1. Run tests in CI, this includes setup treesitter in the installation step.
2. Build package wheel and publish to the project's package registry.
   • Configure poetry to include treesitter .so file in the wheel
   • CI job to upload to registry

How to publish a new version

1. Run git tag -a {version_number} -m "version message"
2. Run git push origin {version_number}

Note that we should not modify the tool.poetry.version field in pyproject.toml, that field is only a placeholder. Instead, in the dist CI job, we fetch the git tag name, and use that as the new version number.

Also note that we shouldn't tag any commits in a MR, only tag commits in main branch.

Ref https://gitlab.com/gitlab-org/modelops/applied-ml/code-suggestions/prompt-library/-/issues/5