Proof caching: use dependency graph to increase hit rate

[FliegendeWurst]

Previously when searching for a reference, the entire sequent of the old proof had to be present in the new proof.
Now, only the useful subset of the old sequent has to be present.
Tested by a unit test.

Additional functionality:

• new "shortened chains" dependency graph rendering mode.
• button in toolbar (and checkbox in options menu) to disable proof caching
• new context menu action on nodes closed by cache to re-open them
• when a referenced proof branch is pruned (= open again), any references to that branch are automatically removed (reopening previously "closed by cache" proofs)

[github-actions]

Thank you for your contribution.

The test artifacts are available on Artiweb.
The newest artifact is here.

[codecov]

Codecov Report

Attention: 333 lines in your changes are missing coverage. Please review.

Comparison is base (603b2ca) 37.93% compared to head (82b0ac9) 37.72%.

Files	Patch %	Lines
...ava/org/key_project/slicing/graph/DotExporter.java	0.00%	41 Missing ⚠️
...org/key_project/slicing/graph/DependencyGraph.java	9.30%	39 Missing ⚠️
...ilkd/key/gui/plugins/caching/CachingExtension.java	0.00%	33 Missing ⚠️
.../gui/plugins/caching/actions/CloseByReference.java	0.00%	30 Missing ⚠️
...d/key/gui/plugins/caching/CachingPruneHandler.java	0.00%	26 Missing ⚠️
...ore/src/main/java/de/uka/ilkd/key/proof/Proof.java	0.00%	25 Missing ⚠️
...i/plugins/caching/actions/CloseAllByReference.java	0.00%	23 Missing ⚠️
...i/plugins/caching/actions/CopyReferencedProof.java	0.00%	20 Missing ⚠️
..._project/slicing/graph/AnnotatedShortenedEdge.java	0.00%	14 Missing ⚠️
...i/plugins/caching/toolbar/CachingToggleAction.java	0.00%	13 Missing ⚠️
... and 14 more

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3305      +/-   ##
============================================
- Coverage     37.93%   37.72%   -0.22%     
+ Complexity    17030    17017      -13     
============================================
  Files          2060     2076      +16     
  Lines        126300   126942     +642     
  Branches      21304    21378      +74     
============================================
- Hits          47913    47889      -24     
- Misses        72499    73156     +657     
- Partials       5888     5897       +9     

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[WolframPfeifer]

Thanks for this improvement! As already discussed, for easier generation of a meaningful changelog, the PR title could be improved. I have only two small remarks/requests (see comments in code).

[WolframPfeifer]

Thanks for these nicely documented PR with convenience and efficiency features!

The only small suggestion from my side would be to remove the white box from the icon, such that it fits our icon design better.

[FliegendeWurst]

The only small suggestion from my side would be to remove the white box from the icon, such that it fits our icon design better.

This is now done.