Base implementation of the popup menu and speedrunner mode in Jak 3.
Autosplitter is untested because I'm on Linux.
Also a couple of other misc changes:
- Model replacements can now have custom bone weights. Needs the "Use
Custom Bone Weights" property (provided by the OpenGOAL Blender plugin)
enabled in Blender.
- Better error message for lump syntax errors in custom level JSON
files.
Fix compiler warnings, and a bug where the `snd_handle` of
`SoundBankInfo` was never set, leading to sound banks never unloading.
The game relies on unloading soundbanks to make sure certain sounds
don't play, like the blue gun 1 fire noise when using blue gun 2.
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Co-authored-by: water111 <awaterford1111445@gmail.com>