Integrate Darwin branch features into integration branch

- Add AeroSpace window manager configuration and file setup
- Add LazyVim setup with gh-addressed plugin
- Add Darwin-specific secrets (work key + work-wg.age)
- Reorganize kitty config into separate profile
- Make Linux-only packages conditional (iputils, strace, vim-tidal)
- Fix nix-darwin compatibility (remove deprecated options, add primaryUser)
- Update font packages to new nerd-fonts structure
- Add platform-aware nrb alias (detects Darwin vs Linux)
- Use shared tmux config instead of Darwin-specific duplicate
- Update Darwin host config (disable yabai, enable AeroSpace)
- Fix sketchybar permissions and gitignore .direnv tracking

Integration branch now works on both Darwin and Linux with all Darwin improvements.

Amp-Thread-ID: https://ampcode.com/threads/T-9427454f-2ecb-40ef-998b-0f33f0950105
Co-authored-by: Amp <amp@ampcode.com>

home/profiles/kitty/ayu-dark-kitty.conf

@@ -0,0 +1,23 @@
+
+background #0A0E14
+foreground #B3B1AD
+cursor #E6B450
+selection_background #273747
+color0 #000000
+color8 #4D5566
+color1 #FF3333
+color9 #D96C75
+color2 #C2D94C
+color10 #91B362
+color3 #FF8F40
+color11 #F29668
+color4 #59C2FF
+color12 #6994BF
+color5 #D4BFFF
+color13 #A37ACC
+color6 #95E6CB
+color14 #4CBF99
+color7 #ffffff
+color15 #F0F0F0
+selection_foreground #B3B1AD
+