[cli] Run local Project detection during vc link --repo (#10094)

Run local Project detection during `vc link --repo`. This allows for creation of new Projects that do not yet exist under the selected scope.

packages/cli/test/unit/util/projects/detect-projects.test.ts

@@ -0,0 +1,30 @@
+import { join } from 'path';
+import { detectProjects } from '../../../../src/util/projects/detect-projects';
+
+const REPO_ROOT = join(__dirname, '../../../../../..');
+const EXAMPLES_DIR = join(REPO_ROOT, 'examples');
+const FS_DETECTORS_FIXTURES = join(
+  REPO_ROOT,
+  'packages/fs-detectors/test/fixtures'
+);
+
+describe('detectProjects()', () => {
+  it('should match "nextjs" example', async () => {
+    const dir = join(EXAMPLES_DIR, 'nextjs');
+    const detected = await detectProjects(dir);
+    expect([...detected.entries()]).toEqual([['', 'nextjs']]);
+  });
+
+  it('should match "30-double-nested-workspaces"', async () => {
+    const dir = join(FS_DETECTORS_FIXTURES, '30-double-nested-workspaces');
+    const detected = await detectProjects(dir);
+    expect(
+      [...detected.entries()].sort((a, b) => a[0].localeCompare(b[0]))
+    ).toEqual([
+      ['packages/backend/c', 'remix'],
+      ['packages/backend/d', 'nextjs'],
+      ['packages/frontend/a', 'hexo'],
+      ['packages/frontend/b', 'ember'],
+    ]);
+  });
+});