Add SteamCMD-based updates for V Rising, Palworld, Zomboid, Terraria

- Create generic SteamCMD handler factory for reusable update logic
- Check build IDs via appmanifest files and Steam API
- Support V Rising (1829350), Palworld (2394010), Zomboid (380870), tModLoader (1281930)
- Show update button for all supported server types in UI
- Minecraft, OpenTTD, Hytale marked as manual-update-only

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

gsm-frontend/src/pages/ServerDetail.jsx

@@ -495,8 +495,8 @@ const formatUptime = (seconds) => {
               </div>
             )}
 
-            {/* Server Update */}
-            {isModerator && server.type === 'factorio' && (
+            {/* Server Update - for supported server types */}
+            {isModerator && ['factorio', 'vrising', 'palworld', 'zomboid', 'terraria'].includes(server.type) && (
               <div className="card p-4">
                 <h3 className="text-sm font-medium text-neutral-300 mb-3">Server Update</h3>
                 <p className="text-neutral-500 text-sm mb-4">