add devlos credits comment

some code refactoring for single responsibility principle.
And deep cloning method for creating instances of mono events and persistent characters,
so it wont conflict with 'custom survivor takeover'

Switched to TimerThinker instead of InvokeUpdate, because InvokeUpdate will stack with each other after restarting map

But After switching I noticed timer thinker double updates

So switched to gmapscript update, it updates every second, interval not customizable?

Before restarting or going to next chapter, record current anomaly for later

After restarting or going to next chapter, try restore previous anomaly record, because they love to change back to vanilla survivors

Never leave on checkpoint, because checkpoint will save current anomaly, and next chapter would still have it joined

Never leave on lose/win, because if previous checkpoint saved the current anomaly before, then restarting would still have it joined

Never leave on death, because the corpse's char num wont be reverted, making it un-defib-able

settings.cfg needs to regenerate

fix percent chance check

Separate some code into different scripts

- AI Director can choose any survivor model
- Can use other custom survivor skins but there's some decompilling and qc editing to do first, not sure how to explain
- if you put your custom context name, that means not vanilla (eg. Gambler, Producer, ...), then no voice. Have to make own custom talker i think, idk

- Added On Join and Leave Success Events. Other scripts can subscribe it to change the ai director's survivor model for example, wip
- trying to fix more bugs

Try to fix cooldown logic error