v1.0.0 of flutter_guardian

Release governance, architecture enforcement, and build intelligence for Flutter apps. Changelog excerpt: - Added the flutter_guardian auditCLI flow. - Added policy-as-code support through guardian.yaml. - Added AST-based security scanning for debug logs, .envusage, JWT-like values, and secret-like literals. - Added architecture boundary checks for feature imports and layer direction. - Added dependency, asset, build, config generation, JSON report, and HTML report modules. - Added flutter_guardian generatefor .env, YAML, and JSON config inputs. - Added Apache License 2.0 project licensing.