LoaderProfileJson does not parse "arguments" object format, missing arguments.jvm and arguments.game

[X12101XX]

what happened

LoaderProfileJson only parses the legacy flat "gameArguments" format and does not handle the modern "arguments" object format. Loader profiles for Forge 1.17+ use: arguments : {"game": [...], "jvm": [...]}

But the parser only checks gamearguments: [...]

this cause two issues:

1. "arguments.jvm" (e.g. --add-opens flags required for Java 17+) are silently dropped, causing Forge to crash on Java 17+ with IllegaAccessError
2. "arguments.game" is also sliently dropped if the profile dosen't include the legacy "gameArguments" fallback.

steps to reproduce

1. Create a Forge 1.20.1 ( need 1.17+) instance ( Forge)
2. Set Java 17+ (Of course, need a correct java version to launch game)
3. Launch - Forge crashes with module access error

rmcl version

0.3.0

operating system

Linux

additional context

(This issue was written with AI assistance for English translation.)