feat: implement SerializableModuleElaborator

[unlsycn]

This PR implements the SerializableModuleElaborator trait, which is used to create elaborators for SerializableModule. In t1, we compile all the Scala code into a jar file and specify different main classes to elaborate different modules.
The config API is used to guarantee the type safety of the parameters, and the design API actually produces the circuit, which is used this way:

  @main
  def config(
    @arg(name = "parameter") parameter:  GCDParameterMain,
    @arg(name = "target-dir") targetDir: os.Path = os.pwd
  ) =
    os.write.over(targetDir / s"${topName}.json", configImpl(parameter.convert))

  @main
  def design(
    @arg(name = "parameter") parameter:  os.Path,
    @arg(name = "target-dir") targetDir: os.Path = os.pwd
  ) = {
    val (firrtl, annos) = designImpl[GCD, GCDParameter](os.read.stream(parameter))
    os.write.over(targetDir / s"${topName}.fir", firrtl)
    os.write.over(targetDir / s"${topName}.anno.json", annos)
  }

Contributor Checklist

• Did you add Scaladoc to every public function/method?
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Type of Improvement

• Feature (or new API)

Desired Merge Strategy

• Squash

Release Notes

Add SerializableModuleElaborator

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[linux-foundation-easycla]

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• ✅ login: unlsycn / name: unlsycn (4a50ec0, 0495756)

[sequencer]

Maybe you or someone can add more documents in the documentation on how to use the SerializableModule in the future, I think for now the chisel-nix project already give a comprehensive example to it. Please update that to use this Elaborator, and point new users to there.

[sequencer]

I still doubt there is an extra copy to Sting here, but the return type is good now and we can improve the internal performance with StringBuild in the future.