Added signature forwarding, reject/cancel options, mandatory document viewing and Smart-ID/Estonian ID-card PKI signing

We have introduced Smart-ID and Estonian ID-card PKI signing, alongside signature forwarding, reject/cancel options, mandatory view actions, and PKI sealing archiving.

This release includes the following updates:

• Smart-ID (smartid) Public Key Infrastructure (PKI) signing.
• Estonian ID-card (esteid) Public Key Infrastructure (PKI) signing.
• Signature forwarding: Added the ability for end-users to forward a signing session to another person, nominating them as the signer.
• Reject and cancel: Added the option for end-users to explicitly reject a signing session and provide a reason, as well as configuration for custom reject and cancel redirect URLs.
• View action: Added support for mandatory view-only documents. Documents can be added with the action set to VIEW to ensure the signer reviews them before signing.
• Archive PKI sealing results: Added support for archiving the cryptographically generated XAdES container when using Public Key Infrastructure (PKI) signing.
• PAdES eID method representation: The opening page of the PAdES document now displays the logo of the eID method used by each signer.