Derive rector minimum core version from core_version_requirement per project
### Problem/Motivation
Extract the minimum Drupal core version from each project's info.yml core_version_requirement constraint and pass it to rector, enabling per-project minimum-version enforcement instead of a global floor.
### Work items
- Commit(s): [2fd4f87770](https://git.drupalcode.org/project/project_analysis/-/commit/2fd4f87770f0)
### Credit
- Implemented by: @bbrala
- Test-project feedback: @goba, @nicxvan, @wimleers, @rfay, @larowlan
---
*Filed retroactively as part of the Drupal 12 rector coverage effort. Closed as fixed; credit to be applied to the contributors listed above.*
*AI was used extensively to build this work and to file this issue. See [Dries Buytaert: AI-generated Rector rules for Drupal](https://dri.es/ai-generated-rector-rules-for-drupal) and [Björn Brala: Drupal Rector rules are config, not code. Mostly.](https://www.linkedin.com/pulse/drupal-rector-rules-config-code-mostly-bj%C3%B6rn-brala-vfpwe/).*
issue