refactor!: remove react dependency for UI interactions (#457)

Remove react as a dependency for UI interactions.
Update jsx components such as Search and Datetime
with astro components.

astro.config.ts

@@ -1,6 +1,5 @@
 import { defineConfig } from "astro/config";
 import tailwindcss from "@tailwindcss/vite";
-import react from "@astrojs/react";
 import sitemap from "@astrojs/sitemap";
 import remarkToc from "remark-toc";
 import remarkCollapse from "remark-collapse";
@@ -10,7 +9,6 @@ import { SITE } from "./src/config";
 export default defineConfig({
   site: SITE.website,
   integrations: [
-    react(),
     sitemap({
       filter: page => SITE.showArchives || !page.endsWith("/archives"),
     }),