Enable Game Mode and refresh release settings

[cypherair]

Summary

• enable LSSupportsGameMode and CADisableMinimumFrameDurationOnPhone through a supplemental Info.plist merged into all app configurations
• bump the app to version 1.1.2 (build 11200), set iOS and macOS deployment targets to 26.6, and include all app icon assets
• add the project-local Xcode MCP configuration using Xcode beta

Verification

• macOS app build succeeded with Xcode 26.6
• iOS Simulator app build succeeded with Xcode 27 beta
• built macOS plist contains LSSupportsGameMode = true
• built iOS Simulator plist contains both requested keys = true
• git diff --check
• Info.plist and .mcp.json syntax validation