[IMP] events: update track and manage talks

[ksc-odoo]

PROJECT TASK: https://www.odoo.com/web#id=3915122&cids=3&menu_id=4720&action=333&active_id=3835&model=project.task&view_type=form

This PR discuss what the Talks, Talk Proposals, and Agenda event website pages entail -- and how to utilize and navigate them. This is meant as a supplemental PR to the 'Create event tracks' doc...which is focused more on the backend elements and how to create tracks for an event.

This PR should be published/merged after the 'event_tracks' PR That's why there is likely going to be continued Build Errors -- because that 'event_tracks' doc is referenced in the seealso at the end.

I worked off the original RST file name so that I didn't ruin any potential reference links that could be lingering elsewhere...

[robodoo]

Pull request status dashboard.

[ksc-odoo]

Hey @brse-odoo -- this one is ready for Peer Review whenever you get a chance...Thanks! 👍

[ksc-odoo]

Thanks for the super-helpful feedback, @brse-odoo -- made all your suggested edits 👍 This one is now ready for Final Review @StraubCreative -- whenever you get a chance. Thanks! 🙏

[StraubCreative]

Rebase to latest on d772c91

[ksc-odoo]

Thanks again for the awesome feedback/suggestions, @StraubCreative -- really appreciate it! I made all those necessary adjustments, and believe this one is now ready for Tech Review, @samueljlieber 🫡

[ksc-odoo]

Thanks for the feedback, @samueljlieber -- made that quick adjustment, and believe this one is ready to go. Thanks again! 👍

@robodoo r+