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/Nixbook/scripts/install.sh

@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+### CONFIGURATION ###
+TARGET_IP="192.168.1.65"
+INSTALL_USER="nixos"
+INSTALL_PASS="123456"
+SSH_KEY="$HOME/.ssh/id_rsa.pub"
+FLAKE_PATH="./#Nixbook"
+
+# Export variables needed inside nix-shell
+export TARGET_IP INSTALL_USER INSTALL_PASS SSH_KEY FLAKE_PATH HOME
+
+### Prerequisites Check ###
+# Removed check, sshpass will be provided by nix-shell
+
+### 0. Ensure SSH key is available ###
+if [ ! -f "$SSH_KEY" ]; then
+  echo "❌ SSH key not found at $SSH_KEY"
+  exit 1
+fi
+
+### 1. Remove existing SSH known_hosts entry if it exists ###
+echo "🧹 Checking for existing SSH known_hosts entry for $TARGET_IP..."
+if grep -q "$TARGET_IP" ~/.ssh/known_hosts; then
+  echo "🔄 Removing existing SSH known_hosts entry for $TARGET_IP..."
+  ssh-keygen -R "$TARGET_IP"
+else
+  echo "✅ No existing SSH known_hosts entry found for $TARGET_IP."
+fi
+
+### 2, 3, 4: Run commands requiring Nix-provided packages ###
+# Use a single nix-shell environment for sshpass, openssh, and nixos-anywhere
+nix-shell -p nixos-anywhere sshpass openssh --run '
+  # Re-set options for this subshell
+  set -euo pipefail
+
+  ### 2. Add SSH key to remote temporary user ###
+  echo "🔐 Copying SSH key to $INSTALL_USER@$TARGET_IP..."
+  # sshpass and ssh-copy-id are from nix-shell environment
+  sshpass -p "$INSTALL_PASS" ssh-copy-id -i "$SSH_KEY" -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null "$INSTALL_USER@$TARGET_IP"
+
+  ### 3. Grant temporary user passwordless sudo on target machine ###
+  echo "🔧 Configuring sudo access for $INSTALL_USER on target..."
+  # ssh is from nix-shell environment
+  ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null "$INSTALL_USER@$TARGET_IP" <<EOF
+# Ensure the sudoers.d directory exists
+sudo mkdir -p /etc/sudoers.d
+# Write the sudo rule
+echo "$INSTALL_USER ALL=(ALL) NOPASSWD: ALL" | sudo tee /etc/sudoers.d/90-$INSTALL_USER
+sudo chmod 0440 /etc/sudoers.d/90-$INSTALL_USER
+EOF
+
+  ### 4. Run nixos-anywhere ###
+  echo "🚀 Starting nixos-anywhere install to $TARGET_IP..."
+  # nixos-anywhere is from nix-shell environment
+  nixos-anywhere \
+    -i ~/.ssh/id_rsa \
+    --ssh-option User=$INSTALL_USER \
+    --ssh-option StrictHostKeyChecking=no \
+    --ssh-option UserKnownHostsFile=/dev/null \
+    --flake $FLAKE_PATH \
+    --build-on-remote \
+    $TARGET_IP
+'
+
+echo "✅ Installation complete!"