fix(cli, typegate): explicitly import DenoRuntime.import modules from path

[Yohe-Am]

When using the dynamic import function, if you provide it a raw path like /foo/bar/baz and deno detects the current module's loaded from a remote host, it'll convert it to a http url. Reasonable behavior but it turned out to be the cause of #560.

This pr fixes this issue along with:

• Puts contents of main.ts in a try/catch block for better error logging.
• Fixes minor permission bugs with the bundled runtime.

Motivation and context

#560

Migration notes

No changes required

Checklist

• The change come with new or modified tests
• Hard-to-understand functions have explanatory comments
• End-user documentation is updated to reflect the change

[Yohe-Am]

Not sure how to test this though. Should I break ground on tests for the cli bundled typegate?

[zifeo]

@Yohe-Am I believe this is small enough, entry point are not usually very testable :)