Customizable Invitation Links for Matrix

[DonPrus]

I'm proposing a new Matrix feature that would allow users to customize the domain used in invitation links, replacing the default matrix.to with their own preferred domain.

This customization offers greater flexibility, personalization, and branding opportunities. Users and organizations could align invitation URLs with their existing domains, improving link coherence, appearance, and trustworthiness.

Such a feature would be especially valuable for organizations relying on Matrix for internal communications, enhancing their branding consistency and reinforcing user confidence in shared links.

[DonPrus]

Adding it here - matrix-org/matrix-spec-proposals#4352