Changes: Primarily implementing more A64 instructions

This makes clang-format useful on those.

Also add a bunch of forgotten transitive includes, which otherwise
prevented compilation.

The TLS area for thread T with id Ti is located at TLS_AREA_VADDR + (Ti - 1) * 0x200.
This allows some games like Mario Kart 7 to continue further.

Removes a TODO.

* Simplifies scheduling logic, specifically regarding thread status. It should be much clearer which statuses are valid
for a thread at any given point in the system.
* Removes dead code from thread.cpp.
* Moves the implementation of resetting a ThreadContext to the corresponding core's implementation.

Other changes:
* Fixed comments in arm interfaces.
* Updated comments in thread.cpp
* Removed confusing, useless, functions like MakeReady() and ChangeStatus() from thread.cpp.
* Removed stack_size from Thread. In the CTR kernel, the thread's stack would be allocated before thread creation.

This will keep track of idle ticks for us, and fixes some tickcount-related issues

- Also a few cleanups.

This was automated using `clang-modernize`.

Fixed typo (make protected member public)

Added license header back in. I originally removed this because I mostly rewrote the file, but meh

ARM: Fixed a type error in dyncom interpreter.

ARM: Updated dyncom to use unique_ptr for internal ARM state.

Removed s_ prefix