refactor: Cleanup tsconfig.json

[saul-jb]

This PR is just a cleanup of tsconfig.json and has the following changes:

• Removes comments making it easier to see what settings are actually being used.
• Replaces the individual path mappings with a single one that links to src.
• Enables the esm option for ts-node so it can be used to run the scripts.

[tabcat]

When welo starts using aegir will probably use the aegir tsconfig as base