feat(flutter-cursor-templates): introduce MCP integration and conventions in project brief

- Added optional MCP integration settings in project-brief.yaml, allowing for environment-based server configurations.
- Introduced conventions for strict package imports to enhance code organization and maintainability.
- Updated brief schema to validate new MCP properties and ensure correct usage.
- Implemented MCP JSON builder to generate .cursor/mcp.json based on project brief settings.
- Enhanced resolver to include MCP configuration in generated files when enabled.

This update improves integration capabilities and enforces coding standards across the project.

flutter-cursor-templates/templates/rules/cicd/cicd.mdc.tmpl

@@ -0,0 +1,29 @@
+---
+description: CI/CD, flavours, and quality gates for {{PROJECT_NAME}}
+globs: [".github/**", "codemagic.yaml", "Makefile", "pubspec.yaml", "fastlane/**"]
+alwaysApply: false
+---
+
+# CI/CD & flavours — {{PROJECT_NAME}}
+
+## Context
+Pipeline and flavour setup must stay aligned with how the app is built and released.
+
+## Flavours
+- Documented in `project-brief.yaml`: **{{FLAVORS_LIST}}**
+- Use `--flavor` / `-t lib/main_<flavour>.dart` (or your project’s entrypoints) consistently across local, CI, and store builds
+- Configuration via `--dart-define` / `--dart-define-from-file` — **never** hardcode secrets in source
+
+## Quality gates (recommended stages)
+- **Lint:** `dart format --set-exit-if-changed .` and `flutter analyze`
+- **Unit + widget:** `flutter test` (with coverage if the team tracks it)
+- **Goldens:** fixed device/locale; CI fails on drift unless intentionally updated
+- **Smoke build:** e.g. `flutter build apk` or `flutter build ios --no-codesign` for the primary flavour
+- **E2E:** when `testing.depth` includes e2e — {{E2E_TOOL}} on CI devices or Firebase Test Lab
+
+## Cursor integration
+- After substantive edits: run analyze and relevant tests before PR
+- For release-oriented tasks, use the **deploy** skill at `.cursor/skills/deploy/SKILL.md` when present
+
+## CI/CD tool
+- Selected in brief: **{{CICD_TOOL}}** (`{{CICD_RAW}}`)