Add Marvel Rivals status

<!--This template is based on https://github.com/macports/macports-ports/blob/master/.github/PULL_REQUEST_TEMPLATE.md, thanks Gcenx!-->

<!--Note: it is best to make pull requests from a branch rather than from main-->

- [ x ] Game page addition
- [ ] Game page modification
- [ ] Other wiki edit

Have you

- [ x ] Followed the [contribution guidelines?](https://github.com/Whisky-App/whisky-book?tab=readme-ov-file#please-read-all-steps-before-contributing)
- [  x ] Ran `./scripts/generate.mjs`?
- [ x ] Ran `./scripts/lint.mjs`?
- [ x ] Checked spelling and grammar?
- [ ] (If applicable) Provided documentation for a game not working? (i.e. detailing what happens when the game doesn't work?)
- [ ] (If applicable) Ensured the linked Steam ID is the correct one for your game addition?

src/SUMMARY.md

@@ -121,6 +121,7 @@
   - [Little Big Adventure – Twinsen’s Quest](./game-support/little-big-adventure-twinsens-quest.md)
   - [Lords Of The Fallen 2014](./game-support/lords-of-the-fallen-2014.md)
   - [Manor Lords](./game-support/manor-lords.md)
+  - [Marvel Rivals](./game-support/marvel-rivals.md)
   - [Marvel's Midnight Suns](./game-support/marvels-midnight-suns.md)
   - [METAL GEAR SOLID V: THE PHANTOM PAIN](./game-support/metal-gear-solid-5-phantom-pain.md)
   - [Metal Slug Tactics](./game-support/metal-slug-tactics.md)

src/game-support/marvel-rivals.md

@@ -0,0 +1,9 @@
+# Marvel Rivals
+<!-- script:Aliases [
+    "Marvel Rivals"
+] -->
+
+{{#template ../templates/rating.md status=Garbage installs=Yes opens=No}}
+
+> [!WARNING]
+> Marvel Rivals is currently **unplayable** in Whisky.