feat: Add Smithery CLI deployment support

- Add smithery package as dependency
- Create smithery_server.py with @smithery.server() decorator
- Add SmitheryConfigSchema for session config (nextcloud_url, username, app_password)
- Add [tool.smithery] section to pyproject.toml
- Remove manual .well-known/mcp-config endpoint (Smithery handles this)

Smithery CLI will automatically:
- Extract config schema from the decorated function
- Handle session config parsing from query parameters
- Make config accessible via ctx.session_config in tools

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

nextcloud_mcp_server/app.py

@@ -1407,51 +1407,6 @@ def get_app(transport: str = "sse", enabled_apps: list[str] | None = None):
     routes.append(Route("/health/ready", health_ready, methods=["GET"]))
     logger.info("Health check endpoints enabled: /health/live, /health/ready")
 
-    # ADR-016: MCP config discovery endpoint for Smithery
-    # Returns the session configuration schema that Smithery uses to render the config UI
-    def mcp_config(request):
-        """MCP configuration discovery endpoint.
-
-        Returns the JSON schema for session configuration parameters.
-        Used by Smithery to render the configuration form for users.
-        """
-        return JSONResponse(
-            {
-                "configSchema": {
-                    "type": "object",
-                    "required": ["nextcloud_url", "username", "app_password"],
-                    "properties": {
-                        "nextcloud_url": {
-                            "type": "string",
-                            "title": "Nextcloud URL",
-                            "description": "Your Nextcloud instance URL (e.g., https://cloud.example.com). Must be publicly accessible.",
-                            "pattern": "^https?://.+",
-                        },
-                        "username": {
-                            "type": "string",
-                            "title": "Username",
-                            "description": "Your Nextcloud username",
-                            "minLength": 1,
-                        },
-                        "app_password": {
-                            "type": "string",
-                            "title": "App Password",
-                            "description": "Nextcloud app password. Generate at Settings > Security > App passwords. Do NOT use your main password.",
-                            "minLength": 1,
-                        },
-                    },
-                },
-                "exampleConfig": {
-                    "nextcloud_url": "https://cloud.example.com",
-                    "username": "alice",
-                    "app_password": "xxxxx-xxxxx-xxxxx-xxxxx-xxxxx",
-                },
-            }
-        )
-
-    routes.append(Route("/.well-known/mcp-config", mcp_config, methods=["GET"]))
-    logger.info("MCP config discovery endpoint enabled: /.well-known/mcp-config")
-
     # Add test webhook endpoint (for development/testing)
     routes.append(
         Route("/webhooks/nextcloud", handle_nextcloud_webhook, methods=["POST"])