feat(darwin-breeze): unify theme colors across KDE, Helium, T3 Code and Ghostty

Move the Darwin Breeze Dark color scheme and global theme into a stow
package. build.py generates the Helium, T3 Code and Ghostty themes from
DarwinBreezeDark.colors, and apply.sh rebuilds and applies them, so the
colors are edited in one place.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

darwin-breeze/.config/ghostty/themes/DarwinBreezeDark

@@ -0,0 +1,23 @@
+# Generated by darwin-breeze/build.py from DarwinBreezeDark.colors
+background = #1e1e1e
+foreground = #dddddd
+cursor-color = #007aff
+cursor-text = #ffffff
+selection-background = #007aff
+selection-foreground = #ffffff
+palette = 0=#3b3b3b
+palette = 1=#ff4a4c
+palette = 2=#30d158
+palette = 3=#ff9230
+palette = 4=#419cff
+palette = 5=#bf5af2
+palette = 6=#64d2ff
+palette = 7=#dddddd
+palette = 8=#747474
+palette = 9=#ff7779
+palette = 10=#64dc82
+palette = 11=#ffad64
+palette = 12=#70b5ff
+palette = 13=#cf83f5
+palette = 14=#8bddff
+palette = 15=#f1f1f1