feat(sdk,plugins): ajoute capability tooling et services runtime publics (workspace/terminal/tasks)

- capability manifeste tooling supportée backend + transport runtime catalog
- ctx.services publique côté SDK/runtime, gated par tooling
- surface honnête: workspace, terminal, et tasks en observation/contrôle uniquement
- docs/exemple/tests mis à jour
- QA PASS sur feature/sdk-plugin-tooling-build-debug-surface

sdk/IdeaSDK/src/manifest.ts

@@ -17,7 +17,7 @@ export interface IdeAPluginManifest {
   };
 }
 
-export type IdeAPluginCapability = "ui" | "mcp";
+export type IdeAPluginCapability = "ui" | "mcp" | "tooling";
 
 export interface IdeAPluginEngineConstraints {
   idea?: string;
@@ -145,8 +145,8 @@ function validateCapabilities(value: unknown, errors: string[]): void {
   }
 
   value.forEach((capability, index) => {
-    if (capability !== "ui" && capability !== "mcp") {
-      errors.push(`capabilities[${index}] must be "ui" or "mcp"`);
+    if (capability !== "ui" && capability !== "mcp" && capability !== "tooling") {
+      errors.push(`capabilities[${index}] must be "ui", "mcp" or "tooling"`);
     }
   });
 }