Add eight playful native terminal effects

[derluke]

Summary

This adds eight original native effects to ttfx:

• airstrike — ASCII planes dive into the text through fire and debris
• automata — a fractal elementary cellular automaton resolves into the text
• bubblepop — rainbow-shimmering bubbles rise, pop, and reveal the text
• malfunction — a cheerful printer produces nonsense before smoothly printing the text
• reverselife — Conway's Game of Life runs backward from chaos into readable lettering
• roses — curling vines, pink roses, and falling petals flower into the text
• sunshower — rain, clouds, a rising sun, and a rainbow paint the text
• voronoi — living crystal grows into a faceted Voronoi mosaic and returns to the text

The transitions deliberately connect each animation to the final lettering, and the longer choreography is intended to feel satisfying as a full-screen screensaver rather than a brief CLI flourish.

A small personal note

These effects were dreamed up, watched, critiqued, and refined together with my children and OpenAI Codex. The children were enthusiastic creative directors and the ultimate quality test: the goal was to make something playful enough to genuinely delight them. Codex collaborated on the design iterations and implementation.

Other changes

• Registers all new effects with --random-effect
• Adds configurable timing, colors, gradients, and effect-specific controls
• Adds stock Omarchy logo GIFs and documents all effects in the README gallery
• Improves the GIF renderer's treatment of block and box-drawing glyphs so terminal artwork stays aligned
• Excludes native-only effects from upstream Python parity comparisons and includes them correctly in benchmarks/gallery metadata

Verification

• cargo test
• cargo check
• git diff --check
• Manually exercised each effect against the full Omarchy screensaver text
• Rendered and visually checked every new stock-logo GIF