spdlog migration

[Niram7777]

shadps4-emu/shadPS4#4069

• todo fix Qt log color

[tochnonechelovek]

New settings are saved, but after saving the changes are not shown and they look like they were before, even though they're changed.
These settings are:
Log -> Switch sync/async, Separate Log Files, Log Type (wincolor, msvc), Log Filter (presets work fine afaik).

[tochnonechelovek]

It'll be useful to add a new description (while hovering over the Log Filter it shows at the bottom) for new style of log filtering syntax.

[Niram7777]

@tochnonechelovek thanks for the tests, it should be better know

[Niram7777]

PR ready, everything should be fixed (there are still some room for improvements like sort the log display buttons, grey out buttons, ... in another PR)

[Niram7777]

PR ready, everything should be fixed (there are still some room for improvements like sort the log display buttons, grey out buttons, ... in another PR)

the extras have been done