Changes

[NB] add handling of edge() and change() operators (#12469)

- edge(d) becomes d and not pre(d)
  - change(d) becomes d <> pre(d)
  - also handled for negated crefs inside the calls

Fix connecting potentially present variables (#12474)

- Assume that connectors are compatible if either of the connector
  elements are missing an associated model, in which case they're
  probably a potentially present variable in an expandable connector.

Fixes #12471

Fix names of records in Base Modelica (#12475)

- Keep the node type from the original node when instantiating a record
  for dumping to Base Modelica, since it contains information needed to
  get the correct name of the record.

Fixes #12422

[NB] support shared literals (#12472)

* [NB] support shared literals

* [NF] move shared literal to the end

 - new record to the end of uniontype to not mess with bootstrapping headers