feat: post styles, next/prev post btn, display-settings, etc.

(cherry picked from commit b7ddd92729d52a8c43d72010b743f7e3477f1001)

tsconfig.json

@@ -8,5 +8,9 @@
         "name": "@astrojs/ts-plugin"
       }
     ]
-  }
+  },
+  "include": [
+    "src/**/**",
+    "src/**/**/**",
+  ]
 }