Add spread effect

[Pikachu920]

Description

Adds a spread effect which can be used to spread a list of objects across multiple settable expressions.

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Target Minecraft Versions: any
Requirements: N/A
Related Issues: N/A

[Fusezion]

Some minor feedback as I didn't have time to look through the trigger method

[sovdeeth]

ValueError: too many values to unpack (expected 2) moment

looks very useful, nice work pikachu!

[Pikachu920]

[sovdeeth]

as mentioned on discord, this warning needs to be more specific about the issue at hand.

[TheBentoBox]

Just wanna call out that, as a professional TypeScript/JS dev and huge Skript user, this is one of the MRs I'm most excited for. Reminds me of the destructuring syntax in JS. Really cool!

[sovdeeth]

spread 1, "a", and pig across (vector length of {_a}), (name of {_b}), and (spawner type of {_c})
let me know if you don't want to support it

[Moderocky]

I am still in favour of the changes I originally suggested.