task: #3621007 Set the recipe version to 1.0.0-beta1

Release issue: #3621007

Sets the recipe version to 1.0.0-beta1 and restores the release constraints for the tagged release.

• composer.json — version 1.0.x-dev → 1.0.0-beta1, and the 19 drupal/varbase_* and drupal/vartheme_bs5_educare requires from 1.0.x-dev back to ~1.0.0. Each of the 19 was checked to have published releases so the constraint resolves. drupal/core (^11.3), the drupal_cms_* (~2), easy_email_express (~1) and recipe_installer_kit (~1) lines are untouched.
• README.md — the release badge text and its ?ref= moved to 1.0.0-beta1. The pipeline badge stays on 1.0.x.
• CHANGELOG.md — a 1.0.0-beta1 section plus the two compare link references.

Shipping in this release, since 1.0.0-alpha3:

• task: #3620996 Give the site template a properly framed installer screenshot and a description in the Drupal CMS house style.

The theme dependency needs no release: drupal/vartheme_bs5_educare 1.0.x is 0 commits ahead of its 1.0.0-alpha5 tag, which ~1.0.0 resolves to.

CI on the commit this branches from (683a0198) was green — pipeline 949094, 23 jobs, all success, none allowed to fail.

AI-Generated: Yes

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