refactor(cli/fmt_errors): Color stack traces in Rust

[nayeemrmn]

This duplicates formatting logic from prepareStackTrace() to cli/fmt_errors and removes colouring logic from prepareStackTrace(). In return, there's no JsStackFrame::formatted_frames, error formatting as a whole is greatly simplified and partially moving prepareStackTrace() to core should be easier.

cc @bartlomieju

[bartlomieju]

@nayeemrmn this looks great! I think formatCallSite could be removed from JS altogether if we replaced it with an op?

[nayeemrmn]

I think formatCallSite could be removed from JS altogether if we replaced it with an op?

Will that work with the copy in cli/tsc?

[bartlomieju]

LGTM, thank you @nayeemrmn, I'll work on the format op

[bartlomieju]

I think formatCallSite could be removed from JS altogether if we replaced it with an op?

Will that work with the copy in cli/tsc?

@ry and I discussed this matter and we think of using default error.stack for deno_core::JsError. All the coloring and source mapping would be a CLI-only operation. cli/tsc is JavaScript only code so it doesn't need source mapping support and coloring could still be done in Rust.