Update admin and marketing layouts, add new admin components

Refined both admin and marketing layouts for a clearer design. Newly added components for the admin page include admin-account-page, admin-members-table and admin-memberships-table. Also included in this update are route renaming, minor text edits and corrections in the code.

apps/web/app/(marketing)/layout.tsx

@@ -9,7 +9,7 @@ async function SiteLayout(props: React.PropsWithChildren) {
   const user = await getUser();
 
   return (
-    <div className={'flex flex-col space-y-8'}>
+    <div className={'flex flex-col space-y-6 xl:space-y-10 2xl:space-y-12'}>
       <SiteHeader user={user} />
 
       {props.children}