Add standalone Python entrypoint for EasyHAProxy and pip-based installation

- Introduced `/scripts/.venv/bin/easy-haproxy` as the default entrypoint for standalone environments.
- Added `_build_parser` and `start` functions to enable CLI-driven functionality configuration.
- Updated packaging to reflect new `easyhaproxy.main` module and adapted project name from `easymapping` to `easyhaproxy`.
- Modified `Dockerfile` to align with new script paths and entrypoints for better portability.
- Enhanced documentation with dedicated sections for pip-based installation, CLI references, and systemd setup for non-Docker environments.
- Adjusted helm, plugin, and environment-related docs for accurate sidebar ordering.
- Added a new GitHub workflow to automate package publishing to PyPI.

.github/workflows/build.yml

@@ -220,6 +220,29 @@ jobs:
       #     chmod +x $HOME/.docker/cli-plugins/docker-pushrm
       #     docker pushrm ${{ env.IMAGE_NAME }}
 
+  Publish-PyPI:
+    runs-on: ubuntu-latest
+    needs: [Test, Tests-E2E-Docker, Tests-E2E-Kubernetes, Tests-E2E-Additional]
+    if: startsWith(github.ref, 'refs/tags/')
+    permissions:
+      contents: read
+      id-token: write  # Required for OIDC trusted publisher
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install uv
+        run: curl -LsSf https://astral.sh/uv/install.sh | sh
+
+      - name: Build package
+        run: |
+          export PATH="$HOME/.local/bin:$PATH"
+          uv build
+
+      - name: Publish to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+
   Helm:
     runs-on: 'ubuntu-latest'
     needs: Build