feat(core): implement tool preselection to reduce context size

- Created ToolPreselectionService using the classifier model to select only relevant tools for a given prompt.
- Integrated pre-selection into LocalAgentExecutor and GeminiClient to automatically filter the tool registry.
- Added `general.toolPreselection` toggle in configuration (enabled by default).
- Added comprehensive unit tests and an E2E scenario confirming accurate tool reduction without loss of function.
- Fixes #17113

packages/test-utils/src/test-rig.ts

@@ -962,6 +962,10 @@ export class TestRig {
     );
   }
 
+  readTelemetryLogs(): any[] {
+    return this._readAndParseTelemetryLog();
+  }
+
   async waitForToolCall(
     toolName: string,
     timeout?: number,