[Feature Request] Emit hook when journal is ready.

[ThreeHats]

Feature request:
Currently, there's no reliable way to determine when the Enhanced Journal is fully loaded and ready for interaction, which leads to timing issues when trying to modify or interact with the journal content.

For context, I'm updating the module gm-notes to display the gm note below the page content. The module also adds a header button that is styled depending on whether there is a gm note attached to the currently viewed page. It can take some time to load the page (especially for large 1000+ page journals), so I've ended up adding a 5 second delay before adding or updating the header button for Enhanced Journal.

Would you consider adding a new hook that fires when the Enhanced Journal is fully loaded and ready? This would be incredibly helpful for module developers who need to perform actions or modifications once the journal is completely rendered and functional.

Suggested Implementation:
A hook named something like monksEnhancedJournalReady that fires after the journal is fully loaded, including all pages and content, passing the app in the hook.

For example:
Hooks.callAll('monksEnhancedJournalReady', this);