* Wrap >4-char literals in a MULTI_CHAR macro

Modern compilers do not support CW's non-standard behavior with
>4 char literals. We can, however, use a constexpr function to
compute the u64 values directly. This leaves <=4 char literals
unchanged.

* Replace non-pointer usages of NULL with 0

* Define NULL to nullptr on C++11 and above

* Fix more -Wpointer-arith and -Woverflow warnings

* Replace u32/s32 with uintptr_t/intptr_t where appropriate

* JSUOutputStream: Overload all standard int types

* some wii OS fixes

* remove old dol2asm comments

* remove dol2asm.h

* remove function address comments

* normalize ATTRIBUTE_ALIGN usage

* DECL_WEAK macro

* fix gcc attribute weak macro

* wrap more mwcc specific things in ifdefs

* fixes

* fix revo sdk version flags

* fixes

* d_a_e_pz equivalent

* rename var

* match f_pc closer to debug

* hopefully fix decompctx

* sdk done

* remove unneeded file

* cleanup f_pc files

* cleanup f_op files

* fix a couple f_op_actor_mng functions

* minor JSystem work

* switch to dtk setup

* some cleanup / fixes

* cleanup d_a_alink literals

* Restore doxygen, update CI & README.md (#1)

* Fix build image ref (#2)

---------

Co-authored-by: Luke Street <luke@street.dev>

* add "global.h" to files that use it

* add MSL_C includes to files that use them

* remove dolphin includes from headers that don't need them

* remove JSupport includes from headers that don't need them

* remove JKernel includes from headers that don't need them

* remove JUtility includes from headers that don't need them

* remove J3D includes from headers that don't need them

* remove J2D includes from headers that don't need them

* remove JAudio2 includes from headers that don't need them

* remove Z2AudioLib includes from headers that don't need them

* remove JMessage includes from headers that don't need them

* remove JParticle includes from headers that don't need them

* remove SComponent includes from headers that don't need them

* remove dol includes from headers that don't need them

* sort includes

* d_a_vrbox / d_a_kytag02 / d_a_obj_eff OK

* some std header setups

* f_pc / profile cleanup

* setup cull data

* remove asm

* d_a_suspend OK