feat: initialize repo with NixOS and Home Manager configs

- Add .gitignore for common languages, tools, and OS/editor artifacts
- Configure .gitattributes for Git LFS (fonts, images, archives, ISOs)
- Add README with repo description
- Add flake.nix defining inputs and outputs for NixOS, Home Manager, and related modules
- Introduce home-manager configs:
  - Base home.nix with packages, services, and programs
  - Hyprland WM configuration (waybar, fuzzel, keybindings, theming)
  - Vim (nixvim) setup with LSP and plugins
  - Zsh setup with aliases, Oh My Zsh, clipboard helpers
  - Systemd user services (e.g., librespot)
- Add scripts (GPU monitor, RAM build helper, install automation)
- Add host configurations:
  - Nixbook (Apple laptop) with hardware, disko, and install script
  - Nixstation (desktop) with firewall, virtualization, Btrfs scrub timer
  - Nixtest (test VM) with QEMU + Alpine-based install test harness
  - Common modules (network, NVIDIA, rclone, screen, keychron, users)
- Include statix config for linting

hosts/common/keychron.nix

@@ -0,0 +1,41 @@
+{ pkgs, ... }:
+
+{
+  services.xserver = {
+    enable = true;
+
+    xkb = {
+      layout = "custom-br";
+      variant = "";
+      model = "pc105";
+      extraLayouts = {
+        custom-br = {
+          description = "US Custom BR (apostrophe + c → ç)";
+          languages = [ "eng" ];
+          symbolsFile = pkgs.writeText "custom-br" ''
+            partial alphanumeric_keys
+            xkb_symbols "basic" {
+              include "us(altgr-intl)"
+              name[Group1]= "US Custom BR (apostrophe + c → ç)";
+
+              // Override the apostrophe key to be a fake dead key
+              key <AC10> {
+                type= "FOUR_LEVEL",
+                symbols[Group1]= [ dead_acute, dead_acute, dead_acute, dead_acute ]
+              };
+
+              // Redefine the c key to output ç when used after apostrophe
+              key <AC03> {
+                type= "ALPHABETIC",
+                symbols[Group1]= [ c, C, ccedilla, Ccedilla ]
+              
+              };
+              replace key <LALT> { [ Alt_L, Meta_L ] };
+
+            };
+          '';
+        };
+      };
+    };
+  };
+}