docs: comprehensive README restructure with improved demos

## README Changes
- Restructured with clearer hierarchy: Why → Core Idea → Diff Problem → How To Use It
- Added side-by-side diff comparison table (Without srtd vs With srtd)
- Replaced ASCII diagrams with concise bash examples
- Restored origin story with HN links and Timely/Memory Engine references
- Simplified Claude Code integration to single sentence with skill/rule links
- Changed H2 sections to H3 for cleaner document outline

## Demo Assets Reorganization
- Moved GIFs to assets/ folder (demo.gif, watch-demo.gif, workflow-demo.gif)
- Moved tape files to scripts/ folder
- Added queue_template_edits.sh helper for watch demo recording
- Updated tape output paths to assets/

## CLI Improvements
- WIP templates now sorted to bottom in build output
- Added "promote to build" hint for WIP templates in italic
- Fixed watch mode event stacking (changed→applied deduplication)
- Old entries (>1min) now dimmed in watch output

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: t1mmen

.gitignore

@@ -56,5 +56,4 @@ CLAUDE.md
 AGENTS.md
 .rules
 opencode.json
-demo.tape
 demo-frames/