feat: module separation of worker module

[mato533]

Break down the modules executed by worker processes into the following units and dynamically load them as needed.
It separate into following modules.

• Cucumber parser
• AST parser (includes "Temp WDIO configuration file creator")

Types of changes

• Polish (an improvement for an existing feature)
• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (improvements to the project's docs)
• Internal updates (everything related to internal scripts, governance documentation and CI files)

Checklist

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary documentation (if appropriate)
• I have added proper type definitions for new commands (if appropriate)

Further comments

Reviewers: @webdriverio/project-committers

[mato533]

worker.cjs is slimmed down!! Next step is babel.