socket2: fix events being reordered

[underengineering]

Describe your PR, what does it fix/add?

fixes socket2 events being reordered due to std::thread racing with other threads in postEvent while pushing multiple events.
drops connections that have too many (64) queued events

Is there anything you want to mention? (unchecked code, possible bugs, found problems, breaking compatibility, etc.)

no

Is it ready for merging, or does it need work?

ready

[vaxerski]

why are you listening for incoming events? nothing should be posted to socket2.

[underengineering]

why are you listening for incoming events? nothing should be posted to socket2.

Idk, it was there before

[underengineering]

Actually i think it's not needed anymore, i'll remove it

[underengineering]

By the way, i think SHyprIPCEvent::event should be renamed to name or type, and std::strings replaced with std::string_view to reduce allocations, but i am not sure if this will break compatibility with plugins (never used them)

[vaxerski]

doesn't really matter that much

[vaxerski]

generally lgtm

[vaxerski]

lgtm thanks