AI Assistant (AIA) Beta 1 Release

First public beta release of the AI Assistant module.

Features:
- AI-powered content type generation
- AI-powered field creation
- AI-powered taxonomy generation
- AI-powered block creation
- AI-powered view generation
- Dry-run mode with unified diff preview
- Full rollback support for all operations
- Comprehensive Drush integration
- Strict validation pipeline
- Task history and audit trail

Quality:
- 117 automated tests with 627 assertions
- 100% PHPCS compliant
- Full kernel test coverage
- Enterprise-grade code quality

Requirements:
- Drupal 10.2+ or Drupal 11.x
- AI module with configured provider
- PHP 8.1+

This is a BETA release for community testing. Feedback welcome!

Issue queue: https://www.drupal.org/project/issues/aia
Documentation: See README.md, INSTALL.txt, and docs/TESTING.md