Restructure modules/shared and update all imports

- Delete 2024-12-rework/ folder
- Rename modules/hosts/common to modules/shared, then split into:
  - modules/shared/home/general
  - modules/shared/home/linux
  - modules/shared/nixos
- Update all import paths throughout the codebase
- Update lib/*.nix to use new paths
- Fix hardcoded /Users/${username} to use config.home.homeDirectory
- Update README and examples/flake-structure.nix

modules/hosts/common/files/tilix/Beanbag-Mathias.json

@@ -1,35 +0,0 @@
-{
-    "name": "Beanbag-Mathias",
-    "comment": "Inspired by colors from EndeavourOS",
-    "background-color": "#07042B",
-    "badge-color": "#FFFFFF",
-    "bold-color": "#FFFFFF",
-    "cursor-background-color": "#FF7F7F",
-    "cursor-foreground-color": "#07042B",
-    "foreground-color": "#E3E3EA",
-    "highlight-background-color": "#000000",
-    "highlight-foreground-color": "#FFFFFF",
-    "palette": [
-        "#000000",
-        "#E52222",
-        "#A6E32D",
-        "#FC951E",
-        "#C48DFF",
-        "#FA2573",
-        "#67D9F0",
-        "#F2F2F2",
-        "#555555",
-        "#FF5555",
-        "#55FF55",
-        "#FFFF55",
-        "#5555FF",
-        "#FF55FF",
-        "#55FFFF",
-        "#FFFFFF"
-    ],
-    "use-badge-color": false,
-    "use-bold-color": false,
-    "use-cursor-color": true,
-    "use-highlight-color": false,
-    "use-theme-colors": false
-}