fix: restore usage data

[maxandersen]

Note

Generates leaderboard YAMLs and combined data, refreshes usage datasets/CSV, and updates the usage page links.

• Backend (statsquery2.java):
  • Add --leaderboards and --leaderboard options; write separate leaderboards to data/leaderboards/*.yaml and combined data/leaderboard.yaml.
  • Aggregate Java versions to x.y, refactor saveLeaderboard/saveNumbers to return content and write via Files.writeString.
  • Build nested YAML content for countries, java_versions, jbang_numbers, jbang_vendors, jbang_versions.
• Data:
  • Add data/leaderboards/{countries,java_versions,jbang_numbers,jbang_vendors,jbang_versions}.yaml.
  • Update data/leaderboard.yaml with generated sections and refreshed percentages/counts.
  • Refresh public/assets/data/jbang-versionchecks.csv counts.
• Frontend:
  • Fix documentation link in content/usage.html and add link to Leaderboards.

^{Written by Cursor Bugbot for commit eb6b1c7. This will update automatically on new commits. Configure here.}

[cursor]

This PR is being reviewed by Cursor Bugbot

Details

You are on the Bugbot Free tier. On this plan, Bugbot will review limited PRs each billing cycle.

To receive Bugbot reviews on all of your PRs, visit the Cursor dashboard to activate Pro and start your 14-day free trial.

[github-actions]

🙈 The PR is closed and the preview is expired.

[cursor]

Bug: Incorrect YAML indentation in jbang_numbers section

The jbang_numbers section has inconsistent indentation where the comment is at 2 spaces but the data items are at 4 spaces. This creates invalid YAML with ambiguous nesting. The data items should be indented at 2 spaces to be direct children of jbang_numbers, matching the indentation level used in separate data/leaderboards/jbang_numbers.yaml file and the format expected by the template rendering.