Adds the `pckernel` system to Jak 2, allowing you to do the PC-specific
things that Jak 1 lets you do like change game resolution, etc.
In other to reduce the amount of code duplication for something that
we're gonna be changing a lot over time, I split it into a few more code
files. In this new system, `pckernel-h.gc`, `pckernel-common.gc`
(previously `pckernel.gc`) and `pc-debug-common.gc` are the files that
should be shared across all games (I hacked the Jak 2 project to pull
these files from the Jak 1 folder), while `pckernel-impl.gc`,
`pckernel.gc` and `pc-debug-methods.gc` are their respective
game-specific counterparts that should be loaded after. I'm not fully
happy with this, I think it's slightly messy, but it cleanly separates
code that should be game-specific and not accidentally copied around and
code that should be the same for all games anyway.
Ports some of the custom PC port debugging code from Jak 1, such as the
entity debugger, Anim Tester X and part tester, to Jak 2 and gives the
PC menu code the same treatment Jak 1 received recently in #2216.
Some adjustments have been made to make things work in Jak 2 and some
stuff is still incomplete.
The majority of the default PC menu code has been left commented out in
preparation for @ManDude's plan to port the rest of the Jak 1 `pckernel`
features to Jak 2.
Also adds the code for `palace-scenes` to gsrc as that seems to have
been missed.
ManDude