Assess and document current functionality of Daml assistant

[basvangijzel-DA]

• [ ] Assess current functionality of assistant, can use https://docs.google.com/spreadsheets/d/1zuudXm8z7jxWuZv5oTstEmVFycvJW29fJP_eqshw-co/edit?gid=1760296771 as a basis
• [ ] Assess what functionality we should keep from a product perspective
• [ ] Assess workload for Daml Hub to reimplement this functionality.
• [ ] Document current behaviour of split release versioning, and design a path forward
• [ ] Consider the future of the release process and the future owners (Daml Hub vs now language team)

[dylant-da]

Split off the documentation into a retro https://github.com/digital-asset/daml/issues/19597