Variadic parameters and spread operator

[lars-reimann]

Is your feature request related to a problem?

For something like Choice, having variadic parameters is needed.

Desired solution

• Add the vararg modifier for parameters again.
• Add a spread operator to be able to pass a list to a variadic parameter.
• Consider whether a function may have variadic, and optional parameters (and in which order).
• Allow using the indexed access operator ([]) on variadic parameters.

Possible alternatives (optional)

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Screenshots (optional)

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Additional Context (optional)

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