Enable manual addition and splitting of sessions in the Zuzalu Branch

[xannyxs]

Problem

Users cannot manually add or split sessions with multiple speakers in the Zuzalu Branch, limiting organisation and management options.

Proposed

• Manual session addition: Allow users to create and add sessions manually for better organization..

This feature will enhance user control and improve the organisation and management of sessions in the Zuzalu Branch.

[xannyxs]

@pabloVoorvaart