chore: update README and CLI usage for cursor_gen, version bump to 1.0.1

- Changed CLI usage instructions from `dart run cursor_gen` to `cursor_gen` for global activation.
- Updated project-brief.yaml example and README to reflect new command usage.
- Added app_context section in project-brief.yaml for theme variants and RBAC roles.
- Fixed bundled template resolution for local and global installs to prevent 'Template not found' errors.
- Version bump to 1.0.1 with corresponding updates in CHANGELOG and pubspec.yaml.

flutter-cursor-templates/generator/templates/hooks/grind-tests.ts.tmpl

@@ -0,0 +1,16 @@
+#!/usr/bin/env ts-node
+// grind-tests.ts — Pre-push hook: runs flutter test
+import { execSync } from 'child_process';
+
+const RED   = '\x1b[31m';
+const GREEN = '\x1b[32m';
+const RESET = '\x1b[0m';
+
+console.log('🧪 Running flutter test...');
+try {
+  execSync('flutter test --coverage', { stdio: 'inherit' });
+  console.log(`${GREEN}✔ All tests passed${RESET}`);
+} catch {
+  console.error(`${RED}✘ Tests failed. Fix failing tests before pushing.${RESET}`);
+  process.exit(1);
+}