feat(FN-2978): add droid-cli package with provider registration and model d

This merge introduces a new `packages/droid-cli` package that bridges AI agent execution as a subprocess, including process management, event streaming, tool mapping, MCP configuration, and thinking-mode support. It also adds the `DroidCliProviderCard` dashboard UI component with onboarding flows an

Fusion-Task-Id: FN-2978

packages/droid-cli/vitest.config.ts

@@ -0,0 +1,25 @@
+import { defineConfig } from "vitest/config";
+import { resolve } from "node:path";
+
+export default defineConfig({
+  test: {
+    globals: true,
+    setupFiles: [
+      "./src/__tests__/setup-test-isolation.ts",
+      resolve(__dirname, "../core/src/__test-utils__/vitest-setup.ts"),
+    ],
+    globalSetup: [resolve(__dirname, "../core/src/__test-utils__/vitest-teardown.ts")],
+    coverage: {
+      provider: "v8",
+      reporter: ["text", "json-summary"],
+      include: ["src/**/*.ts", "index.ts"],
+      exclude: ["src/mcp-schema-server.cjs"],
+      thresholds: {
+        lines: 92,
+        functions: 92,
+        branches: 88,
+        statements: 92,
+      },
+    },
+  },
+});