Add custom message support to no-excluded-rules rule for excluded patterns

- Modified `excludedRuleTexts` and `excludedRegExpPatterns` options to accept either string or `{pattern, message}` object format
- Updated option schema to use union type accepting string or object with optional custom message
- Added validation and transformation pipeline for pattern objects in schema
- Updated option descriptions to reflect new `{pattern, message}` format support
- Regenerated rule documentation with

Author: scripthunter7

CHANGELOG.md

@@ -7,6 +7,14 @@ The format is based on [Keep a Changelog], and this project adheres to [Semantic
 [Keep a Changelog]: https://keepachangelog.com/en/1.0.0/
 [Semantic Versioning]: https://semver.org/spec/v2.0.0.html
 
+## Unreleased
+
+### Added
+
+- Custom messages support for `no-excluded-rules` linter rule. [#275]
+
+[#275]: https://github.com/AdguardTeam/AGLint/issues/275
+
 ## [4.0.0-beta.5] - 2025-12-22
 
 ### Added