feat: implement InfiniteStory (#6)

Infinite Story mod
- Allows watching an infinite number of stories per session
- Skips the dialog about it when selecting a story

Co-authored-by: Jujuforce <jujuforce@gmail.com>
Co-authored-by: akanyan <alicechecker01@proton.me>
Reviewed-on: akanyan/mu3-mods#6
Co-authored-by: jujuforce <jujuforce@noreply.gitea.tendokyu.moe>
Co-committed-by: jujuforce <jujuforce@noreply.gitea.tendokyu.moe>

InfiniteStory/MU3.Sequence/patch_Play.cs

@@ -0,0 +1,12 @@
+using MU3.User;
+using MU3.Util;
+
+namespace MU3.Sequence;
+
+class patch_Play: Play {
+    private extern void orig_Enter_PlayScenario();
+    private void Enter_PlayScenario() {
+        orig_Enter_PlayScenario();
+        Singleton<UserManager>.instance.userLocal.isStoryWatched = false;
+    }
+}