Fix TypeScript errors and clean up unused imports

- Remove unused fs import from app.ts
- Remove unused LLM import and missing module reference from server.ts
- Fix parameter naming inconsistency in fetch.ts execute function
- Add missing metadata property to fetch.ts return statement
- Update test file to use correct API signatures and parameter names
- Remove unused parameters from example.ts

🤖 Generated with opencode
Co-Authored-By: opencode <noreply@opencode.ai>

packages/opencode/src/tool/example.ts

@@ -8,7 +8,7 @@ export const ExampleTool = Tool.define({
     foo: z.string().describe("The foo parameter"),
     bar: z.number().describe("The bar parameter"),
   }),
-  async execute(params) {
+  async execute() {
     return {
       metadata: {
         lol: "hey",