Support new 1.17+ Forge JPMS arguments that don't ship any executable jar. It will use unix_args.txt file for 1.17+ when one exists, otherwise defaults to using the jar file
Fix forge latest build version option to actually use latest instead of recommended
Set build version input rules to only accept valid values of the latest and recommended
Remove spaces from the version variables to avoid issues with curl. Forge site displays versions with spaces to end users
Changes the paper and spongeforge version variable to be editable by users on the client view. There is no reason to have it as read-only. Other eggs have this value as editable
Changes Paper egg server jar variable input rule to match the other Minecraft eggs. Matches `a-zA-Z0-9_` and `.jar` at the end instead of hard-coded length value of 20.
Fixes#3492
