docs: add Sphinx documentation build and deploy workflow

- Add Gitea Actions workflow to build and deploy docs on push to main
- Generate Sphinx reference documentation for all apps and modules
- Deploy versioned and latest docs via rsync over SSH

docs/source/reference/apps/mcp_server/mcp_server.management.commands.rst

@@ -0,0 +1,17 @@
+mcp\_server.management.commands package
+=======================================
+
+.. automodule:: mcp_server.management.commands
+   :members:
+   :show-inheritance:
+   :undoc-members:
+
+Submodules
+----------
+
+.. toctree::
+   :maxdepth: 4
+
+   mcp_server.management.commands.backfill_library_memberships
+   mcp_server.management.commands.create_mcp_token
+   mcp_server.management.commands.seed_signing_key