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repl: support previews by eager evaluating input

Rodrigo Muino Tomonari requested to merge github/fork/BridgeAR/implement-repl-previews into master

This adds input previews by using the inspectors eager evaluation functionality. It is implemented as additional line that is not counted towards the actual input. In case no colors are supported, it will be visible as comment. Otherwise it's grey. It will be triggered on any line change. It is heavily tested against edge cases and adheres to "dumb" terminals (previews are deactived in that case).

Small videos that outline the behavior:

https://asciinema.org/a/YwJ92D8vrj7bD5XGNGZzFhxU8 https://asciinema.org/a/bgalyUuG49w96RSzwfhYzLpXL

This is an alternative to https://github.com/nodejs/node/pull/22875.

Fixes: https://github.com/nodejs/node/issues/20977

Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • tests and/or benchmarks are included
  • documentation is changed or added
  • commit message follows commit guidelines

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