feat(darwin-breeze): add VS Code and Telegram themes

Generate and install a VS Code theme and build an importable Telegram
theme from the color scheme.

darwin-breeze/README.md

@@ -1,7 +1,7 @@
 # Darwin Breeze
 
-Breeze for KDE Plasma 6 in the macOS dark system colors, with Helium, T3 Code
-and Ghostty themed from the same colors.
+Breeze for KDE Plasma 6 in the macOS dark system colors, with Helium, T3 Code,
+Ghostty, VS Code and Telegram themed from the same colors.
 
 Only the colors change. Breeze still draws the widgets and the title bar, and
 the window buttons stay on the right.
@@ -24,7 +24,15 @@ stow darwin-breeze helium
 
 `apply.sh` regenerates the app themes, applies the global theme, hides the
 line under the title bar, turns off the wallpaper accent color and publishes
-the T3 Code theme. Restart Helium afterwards; T3 Code switches on its own.
+the T3 Code theme and installs the VS Code extension. Restart Helium
+afterwards; T3 Code switches on its own. In VS Code, pick "Darwin Breeze Dark"
+once under Preferences → Color Theme; after later color changes, run Developer:
+Reload Window.
+
+Telegram has to import its theme by hand: Settings → Chat Settings → Chat
+background → Choose from file, then pick
+`darwin-breeze/telegram/DarwinBreezeDark.tdesktop-theme` and Apply. Import it
+again after the colors change.
 
 ## Changing colors
 
@@ -44,9 +52,12 @@ Edit it, then run `./darwin-breeze/apply.sh` again. Everything else follows:
 | Helium | `.local/share/helium-themes/`, generated by `build.py` |
 | T3 Code | `t3/darwin-breeze.json`, generated by `build.py` and published with `t3 theme set` |
 | Ghostty | `.config/ghostty/themes/`, generated by `build.py` |
+| VS Code | `vscode/package.json` and `vscode/themes/`, generated by `build.py`, packed into `darwin-breeze.vsix` and installed by `apply.sh` |
+| Telegram | `telegram/DarwinBreezeDark.tdesktop-theme`, built by `build.py` and imported by hand |
 
-The generated files are committed so that `stow` alone gives a working setup;
-don't edit them by hand.
+The generated text files are committed so that `stow` alone gives a working
+setup; the binary packages (Telegram's `.tdesktop-theme`, VS Code's `.vsix`)
+are built by `build.py` instead. Don't edit generated files by hand.
 
 ## T3 Code notes
 
@@ -56,6 +67,39 @@ don't edit them by hand.
   `build.py`), so a new slot or a different mapping is a change there, not a
   hand-edited color.
 
+## VS Code notes
+
+- The workbench colors start from VS Code's own default dark theme, Dark 2026
+  (vendored in `vscode/base/` with the themes it includes). It already lays
+  out its grays as the scheme does: the editor darkest, the chrome around it
+  lighter, widgets lighter still. Each of those becomes the matching scheme
+  gray and the grays between them are interpolated. Other colors take the
+  hue of the matching Apple color and keep their lightness and saturation.
+  Keys with an exact role, such as buttons, badges, the active tab's top
+  border and the git colors, are set directly (`vscode()` in `build.py`).
+- Syntax colors are Pierre Dark's, the theme T3 Code highlights code with
+  (`vscode/base/pierre-dark.json`, taken from T3 Code). They are used as they
+  are, without gamma compensation, so code looks the same in both apps.
+- The terminal uses the same 16 colors as Ghostty.
+- VS Code is Electron, so its workbench colors get the same gamma
+  compensation as Helium and T3 Code.
+- The `.vsix` isn't committed; `build.py` packs it from `vscode/`.
+
+## Telegram notes
+
+- Telegram has some 600 color keys and the scheme has roles for only a few
+  dozen of them (`telegram()` in `build.py`). The rest start from Telegram's
+  own night theme, vendored as `telegram/night.tdesktop-palette`: its
+  blue-tinted grays become scheme grays of the same brightness and its blues
+  take the macOS blue's hue. Other colors, such as the reds, greens and name
+  colors, are kept as night has them.
+- The chat list, top bar and compose bar use the window color; the chat
+  behind the bubbles and the folder strip use the darker view color.
+- Telegram is a Qt app, so unlike Helium and T3 Code it needs no gamma
+  compensation.
+- The `.tdesktop-theme` is a zip, so it isn't committed; `build.py` builds it
+  from the night palette and the color scheme.
+
 ## Helium notes
 
 - Helium loads the theme from `~/.local/share/helium-themes/darwinbreeze`