chore: remove cms and fix some styles (#29)

* chore: remove all references to PayloadCMS

* fix: nextjs landing utils

* feat: refactor community, features, hero, learning resources, and testimonials components to use external JSON data

* fix:remove hero logo box

* fix: remove unused image in public

* fix: change logo.png to logo.webp

* fix: update button styles for improved visibility

* chore: restructure component organization

* fix: update import path for global styles in layout component

* fix: adjust alignment of hero stats section for better layout

* fix: update testimonials placeholder sample data

* fix: update header component to use router for navigation and add signin page

apps/landing/src/app/_components/simple-theme-toggle.tsx

@@ -0,0 +1,38 @@
+'use client';
+
+import { Button, MoonIcon, SunIcon } from '@components';
+import { useTheme } from 'next-themes';
+import { useEffect, useState } from 'react';
+
+export function SimpleThemeToggle() {
+  const { theme, setTheme } = useTheme();
+  const [mounted, setMounted] = useState(false);
+
+  useEffect(() => {
+    setMounted(true);
+  }, []);
+
+  if (!mounted) {
+    return null;
+  }
+
+  const toggleTheme = () => {
+    setTheme(theme === 'dark' ? 'light' : 'dark');
+  };
+
+  return (
+    <Button
+      variant="outline"
+      size="icon"
+      onClick={toggleTheme}
+      className="focus-visible:ring-0 cursor-pointer"
+    >
+      {theme === 'dark' ? (
+        <SunIcon className="h-[1.2rem] w-[1.2rem]" />
+      ) : (
+        <MoonIcon className="h-[1.2rem] w-[1.2rem]" />
+      )}
+      <span className="sr-only">Toggle theme</span>
+    </Button>
+  );
+}