feat(web): Download link to t5de.dev in the header (#2)

A Download link in the header, beside the account menu or Sign in, to t5de.dev/download: T5DE's website with the latest setup, its version and checksum. Gitea's release pages are confusing for people new to it.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

A Download link in the header, beside the account menu or Sign in, to t5de.dev/download: T5DE's website with the latest setup, its version and checksum. Gitea's release pages are confusing for people new to it.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: dhkatz <[email protected]>

apps/web/components/header.tsx

@@ -24,6 +24,9 @@ export async function Header() {
           <NavLink href="/catalogs">Catalogs</NavLink>
         </nav>
         <div className="ml-auto flex items-center gap-2 text-sm">
+          <a href="https://t5de.dev/download" className={buttonVariants({ variant: "ghost" })}>
+            Download
+          </a>
           {me ? (
             <ProfileMenu username={me.username} picture={me.picture} console={isModerator(me)} />
           ) : (