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/nvim/default.nix

@@ -1,4 +1,4 @@
-{ pkgs, ... }:
+{ lib, pkgs, ... }:
 let
   customPlugins = {
     vim-zettel = pkgs.vimUtils.buildVimPlugin {
@@ -1081,7 +1081,6 @@ in
       vim-sexp-mappings-for-regular-people
       fennel-vim
 
-      vim-tidal
       # experimental 
       nvim-luapad
       scnvim
@@ -1093,6 +1092,9 @@ in
       yuck-vim
       nvim-parinfer
       # vim-processing
+    ] ++ lib.optionals pkgs.stdenv.isLinux [
+      # Linux-only plugins
+      vim-tidal  # requires SuperCollider which is Linux-only
     ];
     withPython3 = true;
     extraPython3Packages = pkgs: with pkgs; [ tasklib six packaging ];