* 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

* Fix remaining <string> -> <cstring> for GCC compilation (#3114 follow-up)

MWerks' <string> header transitively includes C string functions
(memcpy, strlen, strcmp, etc.), but GCC/Clang's <string> is the C++
std::string header. These files all use C string functions and should
include <cstring> instead.

* Use std::isnan instead of isnan for GCC compilation

GCC's <cmath> places isnan in the std namespace. Using the unqualified
isnan fails to compile with GCC/Clang.

* Fix cCcD_Src types: s32 -> u32 for bitmask fields

cCcD_SrcObjCommonBase::mSPrm, cCcD_SrcObjTg::mType, and
cCcD_SrcObjAt::mType are used as bitmasks (SetType/SetSPrm take u32,
MskType/MskSPrm use u32, values like 0xFFFFFFFF are common in
aggregate inits). Change from s32 to u32 to match usage.

Also fix AT_TYPE_WOLF_ATTACK/AT_TYPE_UNK to use unsigned literals,
and remove now-unnecessary (s32) casts on hex literals in collision
source data.

* Mark dummy() functions as static to avoid multiple definition errors

These decomp artifact functions have the same name and signature across
TUs, causing linker errors when building as a single binary.

* DBG npc_henna almost, some mg_fshop

* Fix weed_control

* demo_camera_shop OK

* misc dbg symbol/etc fixes

* Fix e_ym/npc_henna dbg bss splits
Thanks @LagoLunatic

* dbg mg_fshop equiv

* PR comments

* DEBUG_CHECK_PAD_TRIG_Z mg_fshop

* Partial e_rd, npc_ks dbg work

* More e_rd matching

* e_rd fixes and dbg ctor matched

* obj_ita dbg equiv

* e_st dbg almost equiv

* Some obj_ladder dbg work

* dbg e_rd PR comments

* Further e_rd dbg clangd fixes

* Last fix for standard compiler error

* adding define guards around headers

* rename cmath.h and climits.h to cmath and climits respectively

* renaming cstdarg.h to cstdarg

* renaming cstdlib.h to cstdlib

* renaming cstring.h to cstring

* renaming cstdio.h to cstdio

* renaming cmath locale ctype

* renaming stdarg string and va_list

* renaming cstddef

* renaming stdio stddef stdlib

* renaming algorithm, functional, iterator, memory, and utility

* renaming bitset, cstdint, limits, and stdint

* renaming new and type_traits

* update quote includes for standard library headers to angle bracket includes

* Remove NDEBUG_DEFINED fakematch, clean up getName temps

* Fix ifdef

* Fix bad JSystem pch ifdef breaking decomp.me

* Remove Acch Chk fakematches

* Private Acch fields

* Fix some clangd errors in headers

* Add UNUSED macro for matching debug parameters

* Enable clangd unused-parameter warning

* Remove extern from initializers

Probably added by dol2asm?

* Fix process profile definitions

* Remove leftover dol2asm address comments

* Remove some unnecessary double casts

* Enable some more clangd warnings

* Fix missing usages of fopAcM_ct

* Fix wrong enum usage

* Fix more fakematches