Issue #3626225: Release Varbase Starter 1.0.4

Issue: https://www.drupal.org/i/3626225

Changes

Release Varbase Starter 1.0.4 from 1.0.x, same shape as 1.0.3:

• composer.json version 1.0.x-dev → 1.0.4; every drupal/varbase_* base recipe → ~1.0.0; drupal/vartheme_bs5 → ~5.0.0.
• README version badge → 1.0.4.
• CHANGELOG 1.0.4 section, and the compare links for 1.0.2, 1.0.3 and 1.0.4 (they had stopped at 1.0.1).

Stacked on the Twig CI fix (#3625607, !67 (merged)) so the pipeline can run green now. Back to DEV follows the tag.

AI-Generated: Yes

Remaining tasks

• Remove the temporary twig/twig:<3.30 pin from .gitlab-ci.yml once a Twig release compatible with Drupal core is out (#3625607).

Checkpoints:

• File an issue
• Addition/Change/Update/Fix
• Testing to ensure no regression
• Automated unit testing coverage
• Automated functional testing coverage
• UX/UI designer responsibilities
• Readability
• Accessibility
• Performance
• Security
• Developer Documentation
• User Guide Documentation
• Reviewed by human
• Code review by maintainers
• Full testing and approval
• Credit contributors
• Review with the product owner
• Release notes snippet
• Release

🤖 Generated with Claude Code