neovim-require-check-hook: discover modules from output

Automatic discovery previously scanned src, but install hooks can move Lua modules before neovimRequireCheckHook runs. Scan out instead so require checks cover the installed plugin layout.

pkgs/applications/editors/vim/plugins/hooks/neovim-require-check-hook.sh

@@ -4,7 +4,7 @@ echo "Sourcing neovim-require-check-hook.sh"
 
 # Discover modules automatically if nvimRequireCheck is not set
 discover_modules() {
-    echo "Running module discovery in source directory..."
+    echo "Running module discovery in output directory..."
 
     # Create unique lists so we can organize later
     modules=()
@@ -30,7 +30,7 @@ discover_modules() {
             echo "$lua_file"
             modules+=("${BASH_REMATCH[1]}")
         fi
-    done < <(find "$src" -name '*.lua' | xargs -n 1 realpath --relative-to="$src")
+    done < <(find "$out" -name '*.lua' -exec realpath --relative-to="$out" {} +)
 
     nvimRequireCheck=("${modules[@]}")
     echo "Discovered modules: ${nvimRequireCheck[*]}"