docs(readme): Apple-style redesign — animated hero, feature tiles, gallery

- Animated TREK logo (light + dark variants) via <picture> + prefers-color-scheme
- 60-second product tour GIF (91MB, 1100x619, 10fps) stored via Git LFS so
  standard clones don't pull it by default
- 9 feature tiles as composite SVG grids: 3x3 on desktop, 2x4 on mobile
- 8 fresh screenshots captured from dev.pakulat.org
- Feature details folded into a collapsible 2-column table
- Environment variables moved behind a collapsible
- Roadmap badge added next to Live Demo / Docker / Discord
- Removed redundant Community section and footer

.gitattributes

@@ -1,6 +1,5 @@
 # Normalize line endings to LF on commit
 * text=auto eol=lf
-
 # Explicitly enforce LF for source files
 *.ts   text eol=lf
 *.tsx  text eol=lf
@@ -14,7 +13,6 @@
 *.yaml text eol=lf
 *.py   text eol=lf
 *.sh   text eol=lf
-
 # Binary files — no line ending conversion
 *.png  binary
 *.jpg  binary
@@ -27,3 +25,4 @@
 *.eot  binary
 *.pdf  binary
 *.zip  binary
+.github/assets/TREK1.gif filter=lfs diff=lfs merge=lfs -text