Allow configuring js runtime for the compiler

[sigmaSd]

Summary

Adding a nim configuration option to choose which javascript runtime to run the js examples with docgen

Description

Currently docgen runs the javascript examples with node, but I want to run it with deno because I depend on Deno apis (when targeting deno) also maybe someone wants to target bun

Currently its hard coded here https://github.com/nim-lang/Nim/blob/1e0165186bb8539cfd8aca1a7af8d01dc278bd46/compiler/nim.nim#L101

I propose adding a configuration option that allows the user to choose the runtime.

Alternatives

No response

Standard Output Examples

No response

Backwards Compatibility

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Links

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[sigmaSd]

I noticed this also affects nim c -r --backend=js file.nim

[sigmaSd]

My current workaround is to use nimble tasks, for example https://github.com/sigmaSd/deno-nim/blob/master/deno_nim.nimble#L26 and mark the docs with "-r:off", while making nimble docs run them with deno

This allows me to write inline tests/examples

[koaledu]

I was about to create a new issue but I noticed this exists. It would be amazing to let us use Bun for running the JS transpiler.