M5 ship infrastructure: icon, version, release script, README

- scripts/make-icon.py: generates a 1024x1024 source.png — dark
  rounded square + 2x2 tile grid with one active-blue tile and one
  broadcast-orange tile (matches the in-app accent colors).
  Regenerated all desktop icon sizes via 'pnpm tauri icon';
  pruned iOS/Android/UWP outputs.
- Version bump 0.0.1 -> 0.1.0 across package.json, Cargo.toml,
  tauri.conf.json. First real release.
- scripts/release.sh: takes vX.Y.Z, sanity-checks (clean tree,
  on main, in sync, tag matches package.json, installer exists,
  tag not already present), tags + pushes, uploads NSIS .exe to
  Forgejo via tea releases create --asset.
- README rewritten: Install section pointing at Forgejo releases,
  Using-it cheatsheet for all M2-M4 features (splits, broadcast,
  palette, etc.), Develop/Test/Release triplet for the WSL<->Windows
  workflow, icon regen instructions.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src-tauri/icons/README.md

@@ -0,0 +1,21 @@
+# Icons
+
+`source.png` — 1024×1024 master icon. Dark rounded square + 2×2 tile grid
+with one tile in the active-blue and one in the broadcast-orange (matching
+the in-app `.leaf.active` and `.leaf.broadcasting` border colors).
+Generated by `../../scripts/make-icon.py`.
+
+To regenerate every size + format Tauri's bundler needs:
+
+```sh
+python3 scripts/make-icon.py
+pnpm tauri icon src-tauri/icons/source.png
+```
+
+That populates `32x32.png`, `128x128.png`, `128x128@2x.png`, `icon.icns`,
+`icon.ico`, plus Android/iOS sizes (ignored — desktop only).
+
+The generated icons are tracked in git so a clean clone can `pnpm tauri build`
+without first running `tauri icon`.
+
+To customize: edit `scripts/make-icon.py` (colors, layout) and rerun.