feat: automated releases via github action

- Restructure & update code check workflows
- Add release workflow to handle checks/tests, build and publish to PyPI
- Add docs/RELEASE.md explaining the workflow & process
- `create_installer.sh`: Update to work with the release workflow
- `create_installer.sh` & `tag_release.sh`: Fix the ANSI escape codes for macOS
- `tag_release.sh`: Add check for python binary name
- `tag_release.sh`: Print `git remote -v` output
- `tag_release.sh`: Fix error when deleting nonexistant tags

.github/actions/install-python-deps/action.yml

@@ -0,0 +1,11 @@
+name: Install python dependencies
+description: Install python dependencies with pip, with caching
+runs:
+  using: 'composite'
+  steps:
+    - name: Setup python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.10'
+        cache: pip
+        cache-dependency-path: pyproject.toml