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/templates/rules/universal/project-context.mdc.tmpl

@@ -34,6 +34,23 @@ alwaysApply: true
 - Design source: {{DESIGN_SOURCE}}
 - API docs: {{API_DOCS_FORMAT}} at `{{API_DOCS_PATH}}`
 
+## Code references
+### Git repositories
+{{GIT_REFS_BLOCK}}
+
+### Local paths
+{{LOCAL_PATHS_BLOCK}}
+
+## Product UX / themes & roles
+- **Theme variants:** {{THEME_SUMMARY}}
+- **Roles:** {{ROLES_SUMMARY}}
+
+{{HIGH_CONTRAST_NOTE}}
+## Reviews — which rule owns what
+- **Theme, colors, typography, spacing/radius tokens** → `ui-ux-standards.mdc` (widgets read `Theme.of(context)` only)
+- **User-visible copy & locales** → `localization.mdc` (ARB / `AppLocalizations`; no UI string literals)
+- **Imports, structure, naming** → `flutter-core.mdc` + architecture rule
+
 ## Architecture boundaries
 {{ARCH_IMPORT_RULES}}
 
@@ -43,3 +60,5 @@ alwaysApply: true
 3. Always use {{ROUTING}} for navigation — never `Navigator.push` directly
 4. Always target platforms: {{PLATFORMS_LIST}}
 5. If code generation tools are used ({{CODEGEN_LIST}}), follow their conventions
+6. Apply visuals only through theme (`ColorScheme`, `TextTheme`, `ThemeExtension`) — never ad-hoc colors/fonts in feature widgets
+7. No user-facing string literals in widgets — l10n or shared constants per localization rule