Invite other users to join a workspace/canvas

[mfgoes]

As a user, I want to invite other users to join my workspace/canvas so that we can work together.

Description:
Allow users to invite other users to join their workspace/canvas for collaboration.

Developer Notes:
Provide an option to share the unique workspace URL with others, either through email or by copying the link. Implement access control to ensure only invited users can join the workspace.

Requirements:
User authentication, access control, unique URL generation for workspaces, email integration (optional).