feat(F3): show process data size and limit

[keturn]

Adds the data size of the process to the F3 debug overlay. This is a value from the operating system, not the JVM.

The new values are:

• Data: 5850.3 / 6144.0 MB (95%)
  • 5850.3 MB is the size of this process's data segment and stack
  • 6144.0 MB is the maximum data size allowed by the --max-data-size=6G option I launched the game with
  • 95% is how close it is to that limit
• Extra: 2778.3 MB is how much larger this data size is than the Total Memory number shown by the JVM

Only implemented for Linux.

How to Test

Push F3 to bring up the debug overlay while in game.

Try it with and without the --max-data-size option on Linux.

[keturn]

Show process data size on F3 debug overlay.

[jdrueckert]

Oh, so if we don't set --max-data-size then data size is unlimited and we don't show any limit accordingly 💡
LGTM code-wise and tests out fine in-game 👍