This pr allows for configuring the framerate target and adds support for two other framerate targets, a "fastforward" and "slowmo" target which can be enabled via either a toggle or holding a button.
this allows for supporting a more accurate framerate target and allows for users to slow down the speed of gameplay if they so desire
non-exhaustive (but exhausting) list of changes:
* base laid for multiple window support, but will likely require more work to work correctly
* encapsulation of frontend state for proper multi-instance support
* (JIT still needs a fix for the NDS::Current workaround but we can get there later)
* new, more flexible configuration system
* nothing works yet
* don't double buffer 3D framebuffers for the GL Renderer
looks like leftovers from when 3D+2D composition was done in the frontend
* oops
* it works!
* implement display capture for compute renderer
it's actually just all stolen from the regular OpenGL renderer
* fix bad indirect call
* handle cleanup properly
* add hires rendering to the compute shader renderer
* fix UB
also misc changes to use more unsigned multiplication
also fix framebuffer resize
* correct edge filling behaviour when AA is disabled
* fix full color textures
* fix edge marking (polygon id is 6-bit not 5)
also make the code a bit nicer
* take all edge cases into account for XMin/XMax calculation
* use hires coordinate again
* stop using fixed size buffers based on scale factor in shaders
this makes shader compile times tolerable on Wintel
- beginning of the shader cache
- increase size of tile idx in workdesc to 20 bits
* apparently & is not defined on bvec4
why does this even compile on Intel and Nvidia?
* put the texture cache into it's own file
* add compute shader renderer properly to the GUI
also add option to toggle using high resolution vertex coordinates
* unbind sampler object in compute shader renderer
* fix GetRangedBitMask for 64 bit aligned 64 bits
pretty embarassing
* convert NonStupidBitfield.h back to LF only new lines
* actually adapt to latest changes
* fix stupid merge
* actually make compute shader renderer work with newest changes
* show progress on shader compilation
* remove merge leftover
* implement channels
* rework power-down support, fixing bugs
* fix bug when W_BeaconInterval is zero
* fix potential missing IRQs when writing to W_IE
* check if an nds save file can be opened for writing
also add the ability to open a file in append mode
* fix multi-instance saves
also move the check for file writability into a separate function (probably uneeded?)
* implement check for gba roms
* move rom load error messages into the functions
also finish gba slot (oops)
* improve error string
* check write perms before saving path settings
* fix memory leak
* check for writability of firmware/nand/sds
* add secondary checks for nand/firmware
* add check for config file being writable
* Return the file write error as a QString to avoid the invalid char*
causing a garbled error message.
Qt wants it as QString either way.
