Neovim template enhancements (#2078)

* feat: add neovim-lualine template, set vim.o.background automatically based on dms light/dark mode

* feat(matugen): add option to follow dms background color or not on neovim

* chore: regenerate settings and translation index after merging master

quickshell/translations/template.json

@@ -5977,6 +5977,13 @@
     "reference": "",
     "comment": ""
   },
+  {
+    "term": "Follow DMS background color",
+    "translation": "",
+    "context": "",
+    "reference": "",
+    "comment": ""
+  },
   {
     "term": "Follow Monitor Focus",
     "translation": "",