Simplify Time Management UCI options

No functional change
Retire struct Log

No more used now that we have removed
"Write Search Log" UCI option.

No functional change.
Rename "Contempt Factor" to "Contempt"

Suggested by Ronald and Lucas on talkchess.

No functional change.

Conflicts:
	src/ucioption.cpp
Add better mate detection and score smoothing.

Bench: 9071237