Files watcher / Hot reload for gamemode

[Deewarz]

Description

It would be great to have the server restart when files are modified in gamemode.

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FYI: I believe there is still some code left on this from when Node.js was used.

Framework/code/framework/src/scripting/server_engine.h

Lines 27 to 29 in a57df13

	cppfs::FileWatcher *_watcher;
	Utils::Time::TimePoint _nextFileWatchUpdate;
	int32_t _fileWatchUpdatePeriod = 1000;

Framework/code/framework/src/scripting/server_engine.h

Line 37 in a57df13

bool _shouldReloadWatcher = false;

[zpl-zak]

We should revisit cppfs's file watcher now that the scripting engine rework is more or less done.

[Segfaultd]

Yes. But it requires deeper work cuz it never properly worked on linux / mac environments.