Add worldborders

[Phill310]

Description

Add worldborder syntax to Skript. Continuation of #5229 Player's worldborder is always virtual

Conditions:

• [x] updated IsWithin condition

Effects:

• [x] expand/shrink worldborder (maybe add grow/contract aliases) I don't like the way I am registering the syntax right now with the of and 's but I can't think of a different way

Events:

• [x] Worldborder bounds change
• [x] Worldborder bounds finish change
• [x] Worldborder center change

Expressions:

• [x] worldborder
• [x] worldborder center
• [x] worldborder damage amount
• [x] worldborder damage buffer
• [x] worldborder size
• [x] worldborder warning distance
• [x] worldborder warning time

Sections:

• [ ] Create worldborder Waiting on https://github.com/SkriptLang/Skript/pull/7037

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Target Minecraft Versions: any Requirements: Paper for worldborder events Related Issues: #5178, #3848