Fix: Re-add accidentially deleted CLI document

docs/how-to/cli.md

@@ -0,0 +1,72 @@
+---
+title: Command-Line Interface - Python Library
+description: Command-Line Interface of the Garden Linux Python Library
+related_topics:
+  - /reference/supporting_tools/python-gardenlinux-lib.md
+  - /reference/python-gardenlinux-lib-cli.md
+  - /how-to/python-gardenlinux-lib-release.md
+migration_status: "new"
+migration_source: ""
+migration_issue: ""
+migration_stakeholder: "@tmangold, @yeoldegrove, @ByteOtter"
+migration_approved: false
+github_org: gardenlinux
+github_repo: python-gardenlinux-lib
+github_source_path: docs/reference/cli.md
+github_target_path: docs/reference/python-gardenlinux-lib-cli.md
+---
+
+# Documentation
+
+_python-gardenlinux-lib_ strictly follows the syntax and intention of
+[Semantic Versioning](https://www.semver.org). Each release reflects the
+intention and expected impact therefore.
+
+A new release is done by tagging a commit with a valid version. This will create
+a GitHub pre-release for proof-reading. Once done a new release can be published
+using GitHub CLI or UI.
+
+Newly added docstrings should contain the first version supporting the new API /
+command line.
+
+## Step by Step Guide
+
+1. **Set version files:**
+
+   _python-gardenlinux-lib_ versioning needs to be set in:
+   - `pyproject.toml`
+   - `.github/actions/setup/action.yml`
+
+   Additionally at the moment (removal pending):
+   - `.github/actions/features_parse/action.yml`
+   - `.github/actions/flavors_parse/action.yml`
+
+2. **Create git tag:**
+
+   ```bash
+   git tag <tag>
+   ```
+
+3. **Review and publish:**
+
+   Review the generated pre-release changelog by visiting the GitHub project
+   release page and publish it if applicable.
+
+4. **Consume the library:**
+
+   Projects consuming the _python-gardenlinux-lib_ may use the following git URL
+   for dependency definition:
+
+   ```bash
+   pip install git+https://github.com/gardenlinux/python-gardenlinux-lib.git@1.0.0
+   ```
+
+   Or in `requirements.txt`:
+
+   ```
+   gardenlinux @ git+https://github.com/gardenlinux/python-gardenlinux-lib.git@1.0.0
+   ```
+
+## Related Topics
+
+<RelatedTopics />