Stats Pattern Update

[jasperf]

This PR updates the stats list block pattern and aligns theme styling and configuration to match the revised pattern output. The change touches both PHP pattern markup and the global styling surface, adjusting patterns/stats-list.php, style.css, and theme.json to keep visual presentation consistent. Documentation is refreshed in readme.txt, and the release record is updated in CHANGELOG.md to reflect the update in a single, coherent change set. Overall impact is a tightened pattern implementation with synchronized theme-level styles and documentation, with 5 files changed and 44 insertions vs 4 deletions. The work is scoped to the theme layer without introducing new build steps or external dependencies.

Pattern Updates and Theme Styling:

• Updated patterns/stats-list.php to refine the stats list pattern output and align it with current theme conventions, improving editor and frontend consistency.
• Adjusted style.css and theme.json to support the updated pattern presentation, keeping global styles and block defaults in sync with the pattern markup.

Documentation and Release Notes:

• Updated readme.txt to document the pattern and theme adjustments so the theme metadata and guidance reflect the current behavior.
• Recorded the change in CHANGELOG.md to maintain an accurate release history for the stats pattern update.

Files Changed:

• CHANGELOG.md (Modified)
• patterns/stats-list.php (Modified)
• readme.txt (Modified)
• style.css (Modified)
• theme.json (Modified)