Move config parsing out of js/compiler.ts

[kitsonk]

This issue is for tracking purposes of something the core team is working on. Informed feedback is welcomed, but please think before commenting.

Moving tsconfig parsing out of compiler.ts requires a couple things:

• Ability to parse JSONC (@dprint has it cc/ @dsherret)
• Having default values and overrides depending on type of compile (e.g. bundle is slightly different to just plain which are also both slightly different from the runtime APIs)
• Changing the ops to just supply a parsed JSON structure of compiler options.

[bartlomieju]

Ref https://github.com/dprint/jsonc-parser

[kitsonk]

In my refactor of the compiler branch, I have all of the parsing and processing of the tsconfig, including the ignoring the options we ignore in Rust now.