bit.lshift - Add a warning about the returned value + Correct note about returned value

bit.rshift - Add note about returned value

string.byte - Add a warning about maximum slice length

Enums/HITGROUP - Add note for HITGROUP_GEAR: https://github.com/VSES/SourceEngine2007/blob/master/se2007/game/shared/shareddefs.h#L269

os.date - %c format specifier is locale-appropriate

File:ReadDouble - Added endianness and clarification

File:WriteDouble - Add endianness clarification

File:ReadFloat - Add endianness clarification

File:WriteFloat - Add endianness clarification

File:WriteUShort - Add endianness clarification

File:WriteULong - Add endianness clarification

File:WriteShort - Add endianness clarification

File:WriteLong - Add endianness clarification

File:WriteDouble - Minor Change

File:ReadUShort - Minor Change

File:ReadULong - Add endianness clarification

File:ReadShort - Added endianness clarification

File:ReadLong - Add endianness clarification

util.ScreenShake - Added a warning about overriding the view origin