feat(constraint_graph): add visualization functionality to the constraint graph #4701
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Type of Change
Description
This PR adds functionality to the constraint graph that allows the graph to describe its structure by generating a DOT program, which can then be visualized by the user through GraphViz.
Additional Changes
Motivation and Context
Being able to visualize a constraint graph would aid with intuition and debugging.
How did you test it?
compiler guided. No API tests required since this is purely a developer-focused feature and does not touch any business logic code.
Checklist
cargo +nightly fmt --all
cargo clippy