[SDK-3266] fix Gree webview clash

[andrew-yangy]

Summary

There is an issue with using both gree webview plugin and our unity sdk, as we are using the same assembly and package name as the original gree webview package.

We need to rename the webview reference in our sdk to solve the clash.

• rename unity-webview.asmdef and change the name from unity-webview to Immutable.Browser.Gree
• change the target from Webview to ImmutableWebview in XCode
• update info.plist
• run ./install.sh, Build Succeeded but gets cp: *.bundle.meta: No such file or directory
• Manually rename /iOS/Webview.mm to /iOS/ImmutableWebview.mm

Customer Impact

Added

Changed

Deprecated

Removed

Fixed

Security

Things worth calling out

Other things to consider:

• Sample app is updated with new SDK changes
• Updated public documentation with new SDK changes (Immutable X and Immutable zkEVM)
• Sample game is updated with new SDK changes
• Replied to GitHub issues