chore(deps)(deps): bump the dart-major group with 2 updates

Bumps the dart-major group with 2 updates: [flutter_lints](https://github.com/flutter/packages/tree/main/packages) and [lints](https://github.com/dart-lang/core/tree/main/pkgs).


Updates `flutter_lints` from 5.0.0 to 6.0.0
- [Commits](https://github.com/flutter/packages/commits/flutter_lints-v6.0.0/packages)

Updates `lints` from 5.1.1 to 6.0.0
- [Release notes](https://github.com/dart-lang/core/releases)
- [Commits](https://github.com/dart-lang/core/commits/lints-v6.0.0/pkgs)

Updates `lints` from 5.1.1 to 6.0.0
- [Release notes](https://github.com/dart-lang/core/releases)
- [Commits](https://github.com/dart-lang/core/commits/lints-v6.0.0/pkgs)

---
updated-dependencies:
- dependency-name: flutter_lints
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dart-major
- dependency-name: lints
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dart-major
- dependency-name: lints
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dart-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pubspec.yaml

@@ -32,8 +32,8 @@ dependencies:
   # Add your embedding provider dependencies as needed (e.g., google_generative_ai, openai, etc.)
 
 dev_dependencies:
-  flutter_lints: ^5.0.0
-  lints: ^5.0.0
+  flutter_lints: ^6.0.0
+  lints: ^6.0.0
   test: ^1.25.0
   build_runner: ^2.4.6
   objectbox_generator: ^5.0.0