Persisting to Neo4J without OGM

[oxisto]

This PR is an attempt to build a lightweight persistence layer to Neo4J without the Neo4J OGM which causes immense problems (recursion depth, out of memory, etc.).

In the long run we might be able to get rid of the neo4j-ogm, which would allow us to re-design the node classes a little bit because we are not restricted by the OGM anymore.

• Persist all Edge edges
• Persist all AST nodes
• Persist edge properties
• Persist types + edges to nodes
• Persist scopes + edges to nodes
• Persist languages + edges to nodes

[codecov]

Codecov Report

Attention: Patch coverage is 86.81818% with 29 lines in your changes missing coverage. Please review.

Project coverage is 76.71%. Comparing base (01f5873) to head (b00078d).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...otlin/de/fraunhofer/aisec/cpg/persistence/Neo4J.kt	85.05%	13 Missing ⚠️
...tlin/de/fraunhofer/aisec/cpg/persistence/Common.kt	86.81%	5 Missing and 7 partials ⚠️
...r/aisec/cpg/graph/declarations/TupleDeclaration.kt	50.00%	1 Missing ⚠️
.../de/fraunhofer/aisec/cpg/graph/scopes/NameScope.kt	0.00%	0 Missing and 1 partial ⚠️
...tatements/expressions/InitializerListExpression.kt	0.00%	1 Missing ⚠️
...n/de/fraunhofer/aisec/cpg_vis_neo4j/Application.kt	92.30%	0 Missing and 1 partial ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
...e/fraunhofer/aisec/cpg/TranslationConfiguration.kt	91.58% <ø> (ø)
...tlin/de/fraunhofer/aisec/cpg/TranslationContext.kt	100.00% <ø> (ø)
...otlin/de/fraunhofer/aisec/cpg/TranslationResult.kt	54.76% <ø> (ø)
...kotlin/de/fraunhofer/aisec/cpg/graph/Assignment.kt	100.00% <100.00%> (ø)
...in/de/fraunhofer/aisec/cpg/graph/MermaidPrinter.kt	90.00% <100.00%> (ø)
.../main/kotlin/de/fraunhofer/aisec/cpg/graph/Node.kt	86.74% <100.00%> (+0.16%)	⬆️
...nhofer/aisec/cpg/graph/declarations/Declaration.kt	100.00% <ø> (ø)
...r/aisec/cpg/graph/declarations/FieldDeclaration.kt	78.94% <100.00%> (+1.16%)	⬆️
...isec/cpg/graph/declarations/FunctionDeclaration.kt	75.00% <ø> (+7.55%)	⬆️
...sec/cpg/graph/declarations/NamespaceDeclaration.kt	93.75% <ø> (ø)
... and 24 more

... and 9 files with indirect coverage changes

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[konradweiss]

Some changes and discussion is still needed here. In some places I wonder if we can use introspectionfunctionality where we now use hardcoded propertyTypes or relationships

[KuechA]

@oxisto can you add a test that #234 is fixed?

[oxisto]

@oxisto can you add a test that #234 is fixed?

Done