feat: add thymeleaf assets processor

Signed-off-by: Ryan Wang <i@ryanc.cc>

tsconfig.json

@@ -1,6 +1,9 @@
 {
   "compilerOptions": {
     // Enable top-level await, and other modern ESM features.
+    "lib": [
+      "dom"
+    ],
     "target": "ESNext",
     "module": "ESNext",
     // Enable node-style module resolution, for things like npm package imports.
@@ -10,6 +13,8 @@
     // Enable stricter transpilation for better output.
     "isolatedModules": true,
     // Add type definitions for our Astro runtime.
-    "types": ["astro/client"]
+    "types": [
+      "astro/client"
+    ]
   }
 }