refactor: consolidate app configurations and utility scripts

- Move 32+ app-specific scripts from features/apps/scripts/ to features/scripts/utils/ for centralized packaging.
- Create individual Nix modules for orphaned app configurations (btop, kitty, tmux, etc.) in features/apps/ using xdg.configFile.
- Fix broken paths in core/system/makima.nix and features/apps/vscode.nix.
- Update VSCode configuration to use the modern 'profiles.default.userSettings' API, resolving deprecation warnings.
- Merge duplicate 'nomarchy-launch-walker' scripts into a single robust utility.
- Remove stale root 'config/' directory.
- Update README.md and docs/creating-themes.md to reflect the new architecture and keybindings.
- Ensure all modules are correctly imported and verified via nix flake check.

installer/install.sh

@@ -21,6 +21,7 @@ BOLD='\033[1m'
 NOMARCHY_REPO=""
 TARGET_DRIVE=""
 USERNAME=""
+LUKS_PASSWORD=""
 USER_PASSWORD=""
 TIMEZONE="UTC"
 HARDWARE_MODULES=""
@@ -151,7 +152,7 @@ get_luks_passphrase() {
         pass2=$(gum input --password --placeholder "Confirm passphrase")
 
         if [[ "$pass1" == "$pass2" ]]; then
-            USER_PASSWORD="$pass1"
+            LUKS_PASSWORD="$pass1"
             break
         else
             error "Passphrases do not match. Try again."
@@ -331,15 +332,14 @@ execute_installation() {
 
     # 9.1 Partition with disko
     info "Partitioning disk..."
-    local escaped_drive disko_file tmp_disko
-    escaped_drive=$(printf '%s\n' "$TARGET_DRIVE" | sed 's/[[\.*^$()+?{|]/\\&/g')
+    local disko_file tmp_disko
     disko_file="$NOMARCHY_REPO/installer/disko-golden.nix"
     tmp_disko=$(mktemp --suffix=.nix)
 
-    sed "s|@TARGET_DRIVE@|$escaped_drive|g" "$disko_file" > "$tmp_disko"
+    sed "s|@TARGET_DRIVE@|${TARGET_DRIVE}|g" "$disko_file" > "$tmp_disko"
 
-    # For LUKS, we need to provide the passphrase
-    echo -n "$USER_PASSWORD" | disko --mode disko "$tmp_disko"
+    # Provide the LUKS passphrase via stdin for disk encryption
+    echo -n "$LUKS_PASSWORD" | disko --mode disko "$tmp_disko"
     success "Disk partitioned"
 
     # 9.2 Generate hardware config