add an initial version of the landing page

src/styles/globals.css

@@ -136,6 +136,10 @@
 }
 
 @layer base {
+  button:not(:disabled),
+  [role="button"]:not(:disabled) {
+    cursor: pointer;
+  }
   * {
     @apply border-border outline-ring/50;
   }
@@ -143,3 +147,8 @@
     @apply bg-background text-foreground;
   }
 }
+
+@utility container {
+  margin-inline: auto;
+  padding-inline: 2rem;
+}