Yellow squiggly lines begone!
Done automatically on .cpp files through `run-clang-tidy`, with manual corrections to the mistakes.
If an import is directly used, but is technically unnecessary since it's recursively imported by something else, it is *not* removed.
The tool doesn't touch .h files, so I did some of them by hand while fixing errors due to old recursive imports.
Not everything is removed, but the cleanup should be substantial enough.
Because this done on Linux, code that isn't used on it is mostly untouched.
(Hopefully no open PR is depending on these imports...)

Logic and structures are largely taken from Linux source:
drivers/bluetooth/btusb.c
drivers/bluetooth/btrtl.c
drivers/bluetooth/btrtl.h

Unlike custom banners which work as an override, this mechanism works as
a fallback. The use case is if you have games you don't really play but
want to keep around for testing purposes without filling up your NAND
with lots of saves. For ease of use, the directory structure is the same
but only title/$title_hi/$title_lo/data/banner.bin files are
relevant.

Badges are saved in /User/Cache/RetroAchievements on first download and reused from there instead of redownloaded.

Rekindle software JIT profiling with a std::chrono conversion and a config connection.

With a purpose-built Branch Watch feature built into the emulated system: BranchWatchDialog, replacing CodeDiffDialog, is now better than ever!

Built-in assembler for debugger interface