Arbitrary arity tuple

[Primetalk]

Fixes #411

Problem

To support Scala 3-style tuples, a few changes are needed:

• support at Quat level;
• decode to Scala 3 tuples;
• support pattern matching inside quotes;
• tuple construction (*:) inside quotes.

Solution

So far Quat and decoding are implemented.

There are two variants of decoding:

• using recursive approach;
• using runtime.Tuples.fromIArray.

The latter might be more performant.

Checklist

• [x] Unit test all changes
• [ ] Update README.md if applicable
• [x] Add [WIP] to the pull request title if it's work in progress
• [ ] Squash commits that aren't meaningful changes

@getquill/maintainers

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[deusaquilus]

This is really amazing work! Thank you!