Ship the omarchy-nvim plugin cache once

package() staged the LazyVim data tree twice: once at
/usr/share/omarchy-nvim/data and again at /etc/skel/.local/share/nvim. Only
the /etc/skel copy is ever read — new users are seeded from it, and
omarchy-nvim-setup prefers it — so the /usr/share copy was dead weight worth
close to half the package, which today is 243 MB installed and 178 MB read off
the ISO on every install. That made omarchy-nvim the largest package in an
Omarchy install after noto-fonts-cjk.

Drop it once /etc/skel has its copy, after the chmod and worktree restore that
copy inherits. config/ stays: both the Omarchy 4 remote-clipboard migration and
the 3.x disable-news-alert migration read it from there.

omarchy-nvim-setup's package-dir fallback narrows to config/ to match. It could
never have fired for data anyway — the setup script and /etc/skel ship in the
same package, so a new script can't pair with an old layout — and the remaining
way to lose the seed, hand-clearing /etc/skel, now says which directory is
missing and that pacman owns it.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

pkgbuilds/omarchy-nvim/omarchy-nvim-setup

@@ -49,14 +49,15 @@ EOF
 done
 
 # Prefer /etc/skel so legacy setup/refresh uses the exact seed copied into new
-# users' homes. Fall back to the package share dir for older package layouts.
-if [[ ! -d "$CONFIG_SOURCE_DIR" || ! -d "$DATA_SOURCE_DIR" ]]; then
+# users' homes. Only the config tree still has a package-dir copy to fall back
+# on for older package layouts; the plugin cache ships once, in /etc/skel.
+if [[ ! -d "$CONFIG_SOURCE_DIR" ]]; then
   CONFIG_SOURCE_DIR="$PACKAGE_DIR/config"
-  DATA_SOURCE_DIR="$PACKAGE_DIR/data"
 fi
 
 if [[ ! -d "$CONFIG_SOURCE_DIR" || ! -d "$DATA_SOURCE_DIR" ]]; then
-  echo "Error: omarchy-nvim defaults not found; is omarchy-nvim installed?" >&2
+  echo "Error: omarchy-nvim defaults not found in $CONFIG_SOURCE_DIR / $DATA_SOURCE_DIR." >&2
+  echo "The package owns both; restore them with: sudo pacman -S omarchy-nvim" >&2
   exit 1
 fi