Improve KomodoClient experience for URL and Error handling

[FoxxMD]

This PR improves the developer experience for using the komodo_client npm package:

• Compensate for URLs with trailing slashes when joining api path
• Implement a KomodoApiError class extending Error, used for api response rejection instead of plain object
  • Uses Error Cause for non-komodo errors
  • Error message is extracted from Serror, if present
  • Appends trace, if present, to stack string
  • Exposes response and SError as class fields

Many third party logging and network-wrapping libraries are used to handling rejected/thrown Error instances, so using a real Error means developers and end users get better readability and visibility into errors for free.

[FoxxMD]

The only thing I haven't accounted for here is if Komodo itself (through Action) expects the rejected object to be structured the old way. If this is the case I can add fields to the class to make its structure mirror the old way so Komodo can handle it without changing any other code.

[mbecker20]

In bin/core/src/api/execute/action.rs, line 309 the Action does handle the catch case in hardcoded way. I think this change may affect this part and must be tested, could you include some test case / results?