feat(lineNumbers): refactor line number generation and enhance element metrics handling

package.json

@@ -1,7 +1,7 @@
 {
   "name": "theme-terminal",
   "private": true,
-  "version": "1.1.9",
+  "version": "1.1.9a",
   "description": "A terminal like theme for Halo.",
   "scripts": {
     "dev": "vite build --watch",