fix: initialize games-xblock correctly in preview mode

[viv-helix]

Description

This PR addresses multiple issues in the Games XBlock related to preview behavior, multi-XBlock usage, and versioning.

Changes

1. Fixed preview mode for Games XBlock:

   • Corrected preview behavior for both Matching and Flashcards game types
   • Preview now accurately reflects in-course behavior

2. Fixed game start issues when multiple Games XBlocks are present:

   • Resolved conflicts that prevented a game from starting when two or more Games XBlocks exist within the same unit
   • Each XBlock now initializes and runs independently as expected

3. Version bump:

   • Incremented the XBlock version to reflect the fixes and improvements included in this release

Impact

• Authors can reliably preview Matching and Flashcards games
• Courses can safely include multiple Games XBlocks in a single unit
• No breaking changes for existing content

Testing

• Verified preview mode for both Matching and Flashcards game types
• Tested multiple Games XBlocks within the same unit to confirm each starts correctly
• Confirmed version bump is applied and packaged correctly

Jira

• https://2u-internal.atlassian.net/browse/TNL2-468

Screenshot

preview-mode.mp4