feat: initial NixOS home lab infrastructure setup

- Add modular flake-based NixOS configuration
- Implement GitOps foundation with CI/CD pipeline
- Create comprehensive documentation and branching strategy
- Add modular desktop environments (GNOME, Cosmic, Sway)
- Configure virtualization stack (Incus, Libvirt, Podman)
- Set up development tools and hardware-specific modules
- Establish user configuration with literate programming support

This commit represents the completion of Phase 1: Flakes Migration
with modular configuration, virtualization, and GitOps foundation.

modules/development/tools.nix

@@ -0,0 +1,40 @@
+{ config, pkgs, ... }: {
+  # Development editors and tools
+  environment.systemPackages = with pkgs; [
+    # Editors
+    zed-editor
+    neovim
+    emacs
+    vscode
+    vscodium-fhs
+
+    # Language servers
+    nixd
+    zls
+    alejandra
+    python3Packages.python-lsp-server
+    gopls
+    luajitPackages.lua-lsp
+    nodePackages.bash-language-server
+    vimPlugins.cmp-nvim-lsp
+    ccls
+    marksman
+
+    # Programming languages and tools
+    guile
+    rustup
+    gdb
+
+    # Development utilities
+    git
+    nix-direnv
+    gh
+    github-copilot-cli
+  ];
+
+  # System-wide Emacs daemon
+  services.emacs.enable = true;
+
+  # Enable ZSH system-wide for development
+  programs.zsh.enable = true;
+}