Updated the Nintendo DS - melonDS emulator.

- build system and CI fixes 
- DSi title manager: fix handling of title strings
- fix gdbstub not activating until the console is reset
- improve audio when not running at 60FPS
- fix a lot of warnings
- fix framelimiter bugs
- add support for solar sensor without using Boktai ROM
- set SDL_HINT_APP_NAME
- fix undefined behavior when indexing into ARCode::Code
- DLDI: add support for unaligned I/O in melonDLDI driver
- audio settings: fix mic settings not applying when closing the dialog
- multiplayer: load firmware from correct instance-specific file
- 3D: small fix to translucency flag assignment
- AES: load Tad key
- slot-2: add support for Motion Pak and Guitar Grip
- DSP: fix PDATA reads
- slot-2: don't return 0 when attempting to read from the GBA GPIO address
- camera: always trigger DMA when reaching the end of a frame
- NDMA: fix IRQ in infinite repeat mode
- camera: fix resolution selection code
- UI: fix OpenGL issues with multiple windows
- UI: add a way to tell windows apart 
- camera: make timings and FIFO more accurate
- DSi: add support for 32-bit bus VRAM timings (SCFG_EXT9 bit13)
- sound: use single buffer, improves audio latency
- fix "full bios boot" not being set properly on initial DSi class creation