listener subscribes to and emits content directory event

[pascalopitz]

This one can tell us whether an index is in progress or not.

[github-actions[bot]]

:tada: This PR is included in version 1.14.0-alpha.1 :tada:

The release is available on:

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

Your semantic-release bot :package::rocket:

[bencevans]

:tada: This PR is included in version 1.14.0 :tada:

The release is available on:

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

Your semantic-release bot :package::rocket: