Add original Wall Breaker runner

[custsly]

Type of Change

• Add a new runner
• Fix or improve an existing runner
• Other (site, docs, tooling)

Runner Summary

Adds Wall Breaker, a fully original construction-worker runner. The animation shows a worker in an orange hard hat, safety goggles, high-visibility vest, teal work trousers, red gloves, and black safety boots swinging a sledgehammer into a generic brick wall. A text-free starburst and brick debris emphasize the impact before the wall resets for a seamless loop.

This original runner replaces the third-party-IP-based concept proposed in closed PR #8. It does not reuse that runner's name, dialogue, character likeness, costume, frames, or other identifying elements.

Validation

• 16 RGBA PNG frames, each 61×36 px
• Animated preview.png verified as a 61×36 APNG
• Frame archive contains only consecutively numbered PNG files
• Full repository validation passed: uv run --with-requirements .github/scripts/requirements.txt python .github/scripts/validate_runners.py --all

Checklist for Adding a Runner

• All frames are PNG files named <runner-name>-frame-<N>.png (numbered from 0), with a height of exactly 36px, a width between 10px and 100px, and all frames share the same size.
• The zip contains only the frames — no .DS_Store, __MACOSX/, or ._* entries.
• The runner is my original work, or I hold the rights to it, and I consent to its distribution under this repository's license (Apache-2.0).
• The runner does NOT contain third-party intellectual property (e.g., Pokémon, Mario, or other copyrighted/trademarked characters).
• Files are placed at runners/<runner-name>/ as <runner-name>-frames.zip, metadata.json, and preview.png.
• runners/manifest.json includes the new runner name, following the existing ordering of the list.
• metadata.json contains the correct displayName and author.
• preview.png is an animated PNG (APNG), 36px tall, at most 100px wide, and animates correctly.
• I have read CONTRIBUTING.md and followed the steps described there.

[Ed2n-lab]

Always thanks for your Program...! Can you bring me back my little "Bird" runner... I'll miss her...... plz...

[Kyome22]

@Ed2n-lab Please open a separate issue yourself to request the Bird runner.

[Kyome22]

LGTM