refactor: restructure CLI and improve documentation/typing

- Consolidated CLI commands into [build](cci:1://file:///c:/Users/vishe/WorkSpace/code/aetos/doc-forge/docforge/cli/mkdocs/logic.py:48:0-58:46) and [serve](cci:1://file:///c:/Users/vishe/WorkSpace/code/aetos/doc-forge/docforge/cli/commands.py:70:0-92:32) using `--mkdocs` and `--mcp` flags.
- Separated CLI orchestration logic into [docforge/cli/mkdocs/logic.py](cci:7://file:///c:/Users/vishe/WorkSpace/code/aetos/doc-forge/docforge/cli/mkdocs/logic.py:0:0-0:0) and [docforge/cli/mcp/logic.py](cci:7://file:///c:/Users/vishe/WorkSpace/code/aetos/doc-forge/docforge/cli/mcp/logic.py:0:0-0:0).
- Moved command definitions to [docforge/cli/commands.py](cci:7://file:///c:/Users/vishe/WorkSpace/code/aetos/doc-forge/docforge/cli/commands.py:0:0-0:0), making [main.py](cci:7://file:///c:/Users/vishe/WorkSpace/code/aetos/doc-forge/docforge/cli/main.py:0:0-0:0) a thin entry point.
- Aligned [.pyi](cci:7://file:///c:/Users/vishe/WorkSpace/code/aetos/doc-forge/docforge/cli/main.pyi:0:0-0:0) type stubs with [.py](cci:7://file:///c:/Users/vishe/WorkSpace/code/aetos/doc-forge/tests/conftest.py:0:0-0:0) implementations across the package.
- Added missing docstrings to internal helper functions and core classes.
- Restructured tests into `tests/mkdocs/` and `tests/mcp/`.
- Updated navigation specification to reflect the new project structure.

docforge/cli/mcp/logic.py

@@ -0,0 +1,39 @@
+from pathlib import Path
+import click
+from docforge.loaders import GriffeLoader, discover_module_paths
+from docforge.renderers import MCPRenderer
+from docforge.servers import MCPServer
+
+def generate_resources(module: str, project_name: str | None, out_dir: Path) -> None:
+    """
+    Generate MCP-compatible documentation resources.
+    """
+    loader = GriffeLoader()
+    discovered_paths = discover_module_paths(module)
+    project = loader.load_project(discovered_paths, project_name)
+
+    renderer = MCPRenderer()
+    renderer.generate_sources(project, out_dir)
+
+def serve(mcp_root: Path) -> None:
+    """
+    Serve MCP documentation.
+    """
+    if not mcp_root.exists():
+        raise click.ClickException(f"mcp_docs directory not found: {mcp_root}")
+
+    required = [
+        mcp_root / "index.json",
+        mcp_root / "nav.json",
+        mcp_root / "modules",
+    ]
+
+    for path in required:
+        if not path.exists():
+            raise click.ClickException(f"Invalid MCP bundle, missing: {path.name}")
+
+    server = MCPServer(
+        mcp_root=mcp_root,
+        name="doc-forge-mcp",
+    )
+    server.run()