feat: add VITE_SEO_SITE_URL to environment configuration and update SEO component

src/vite-env.d.ts

@@ -1,8 +1,8 @@
 /// <reference types="vite/client" />
 interface ImportMetaEnv {
-  // todo add env properties here
+  readonly VITE_SEO_SITE_URL: string
 }
 
 interface ImportMeta {
   readonly env: ImportMetaEnv
-}
+}