[TEST] Refactor graph logic tests to work without @d4c/numjs

[EZheln]

📝 Description

Refactored the graph node and arrow logic to remove the dependency on @d4c/numjs.
Added dynamic validation to check connections between nodes and arrows, making the validation more reliable across different graph scales and UI rendering variations.

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🛠️ Changes Made

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✅ Checklist

• I have given the PR a well-structured title describing the domain and the specific change that was made
• I tested the changes in the browser (locally or via preview build)
• I confirmed that existing tests pass
• I added or updated unit / integration tests (if needed)
• I checked that this change doesn’t introduce new console warnings or lint / formatting errors
• I updated the relevant Jira ticket with the appropriate details and status

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🔗 References

• Related ticket / issue:
• Figma / design spec:
• Documentation:

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🚨 Potentially Breaking Changes

• Yes
• No

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Includes DRC change

• Yes
• No

If yes -> requires bump NPM version

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🔍 Additional Notes

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📸 Screenshots / Demos

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