docs: clean up types and add API docs site

[erickzhao]

Similar to electron/osx-sign#320 but for notarize.

Significant changes:

• Removal of NotarizeStapleOptions which is functionally identical to NotaryToolNotarizeAppOptions.
• Added details on keychain credential authentication and debugging notarization credentials
• Added more usage examples with each authentication strategy

See preview: https://erickzhao.github.io/notarize/

[continuous-auth[bot]]

:tada: This PR is included in version 2.4.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: