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...)

Requires at least GCC 12, Clang 15, MSVC 19.32, or AppleClang 14.0.3.

Invert conditions, invert decrement checks, and make conditional branches unconditional. USnapshotMetadata in prior versions of Dolphin is forward-compatible with these changes (tested on x86_64).

Branch Watch Tool: Add Set Breakpoints Submenu

Also, right-clicking the table's scroll area when all columns are hidden will show the column visibility menu.

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