feat: add VisitNode function to builder

[elsapet]

Description

• Added SetVisitNode and VisitNode functions to the Builder, allowing analyzers to visit individual child subtrees instead of all-or-nothing visitChildren
• Set function in analyzeNode in ast.go before each Analyze call

This is to address a cyclic issue that can be seen when handling for-loops for some languages:

The root cause is that visitChildren is all-or-nothing — you either visit all children or none. What for-loops need is to visit the value in the outer scope, then declare bindings, then visit the body in the inner scope.

We keep the impact minimal here and do not use this VisitNode for bearer languages, although Java could benefit from it

Checklist

If this is your first time contributing please sign the CLA

• I've added test coverage that shows my fix or feature works as expected.
• I've updated or added documentation if required.