Stop requiring and applying Varbase Blog Base

Problem/Motivation

The Rightup publishes news, not blog posts, yet the recipe requires drupal/varbase_blog_base and applies it. Every install carries a Blog post type, a blog view, 19 blog Canvas templates, a "Latest Blog Posts" pattern and blog views blocks nobody uses.

Steps to reproduce

1. Install The Rightup from 1.0.x-dev.
2. Look at the content types, views and Canvas templates: the blog ones are there, unused.

Proposed resolution

• Remove the requirement and the recipe from composer.json and recipe.yml, with every blog-only config and action.
• Point the author articles view and the CTA card at news.
• Tests create news posts where they created blog posts; the 06 suite becomes 06-content-news.

Only fresh installs change. Existing sites keep their Blog post type.

Checked on a fresh DDEV install of the branch: 33 news, 6 podcasts, 67 episodes, 16 Canvas pages; home, /news, article, author, landing and podcast pages return 200; axe-core reports 0 WCAG 2.2 AA violations; no "blog" text anywhere. 05-content-pages 9/9, 06-content-news 4/4, 09-drupal-canvas 14/14, 12-content-access-and-lock 26/26, 15-quality 110/110; 13-varbase-recipes green except the three API/auth/i18n recipe scenarios that CI applies after install. MR !64 pipeline: 36/36 green.

AI-Generated: Yes

Remaining tasks

• ✅ File an issue
• ✅ Addition/Change/Update/Fix
• ✅ Testing to ensure no regression
• ➖ Automated unit/functional testing coverage
• ➖ Developer Documentation support
• ➖ User Guide Documentation support
• ➖ UX/UI designer responsibilities
• ➖ Accessibility and Readability
• ❌ Reviewed by a human
• ❌ Code review by maintainers
• ❌ Full testing and approval
• ❌ Credit contributors
• ❌ Review with the product owner
• ❌ Update Release Notes
• ❌ Release
• ✅ Open the MR

User interface changes

• No Blog post type, blog view, blog templates or "Latest Blog Posts" pattern on fresh installs.

API changes

• N/A

Data model changes

• Fresh installs no longer get the Blog post content type.

Release notes snippet

• N/A