feat(interpreter): Expand Dataflow Capabilities

[loukratz-bv]

Description / purpose of change(s):

Adds the following steps:

• Explode
• Construct
• Collect

Also:

• Fixes issues with failed messages not be emitted
• Removes Step cardinality -- it was confusing
• Stops deep copies of messages and makes FlowMessage immutable
• Makes filewriter consistent with collect behavior (emits one message at end with common ancestors)
• Adds suport for UI Hints (though only textarea is supported right now)
• Makes REST fronend allow toggle between table and card view

Technical notes / screenshots / additional information (optional):

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
2303	1832	80%	70%	🟢

New Files

File	Coverage	Status
qtype/base/ui_shapes.py	100%	🟢
TOTAL	100%	🟢

Modified Files

File	Coverage	Status
qtype/base/types.py	97%	🟢
qtype/dsl/model.py	96%	🟢
qtype/semantic/checker.py	62%	🟢
qtype/semantic/generate.py	90%	🟢
qtype/semantic/model.py	100%	🟢
TOTAL	89%	🟢

updated for commit: 6cbb1f1 by action🐍