Support MCP extensions in open plugins (#9471)

Signed-off-by: Douwe M Osinga <douwe@sidewalklabs.com>
Co-authored-by: Douwe M Osinga <douwe@sidewalklabs.com>

ui/desktop/openapi.json

@@ -4991,6 +4991,10 @@
               "cmd": {
                 "type": "string"
               },
+              "cwd": {
+                "type": "string",
+                "nullable": true
+              },
               "description": {
                 "type": "string"
               },

ui/desktop/src/api/types.gen.ts

@@ -392,6 +392,7 @@ export type ExtensionConfig = {
     available_tools?: Array<string>;
     bundled?: boolean | null;
     cmd: string;
+    cwd?: string | null;
     description: string;
     env_keys?: Array<string>;
     envs?: Envs;