Introduce a new mode: INDIVIDUAL_ACKNOWLEDGE

Many messaging systems, like Apache Pulsar with Shared subscriptions, support acknowledging single messages.
Current Session.CLIENT_ACKNOWLEDGE requires that all the messages dispatched by the session have to be acknowledged and not only that single message.

Some references:
- Apache Pulsar via Starlight for JMS: https://github.com/datastax/pulsar-jms/pull/30
- Apache ActiveMQ Artemis: https://activemq.apache.org/components/artemis/documentation/latest/pre-acknowledge.html

Start by reading the Jakarta Messaging specification around Session.CLIENT_ACKNOWLEDGE and compare the referenced Pulsar JMS and ActiveMQ Artemis behavior. Define the semantics and compatibility requirements for INDIVIDUAL_ACKNOWLEDGE, then identify the specification and test locations that must demonstrate single-message acknowledgement.

Written by the indexing model from the issue text.