[DYN-7839] Wires & Pins: improve snapping tolerance

[ivaylo-matov]

Purpose

PR aims to address DYN-7839.

This update enhances the snapping tolerance for connectors when interacting with the ConnectorAnchor.

A second, invisible connector has been introduced to handle MouseEnter and MouseLeave events. This invisible connector features a dynamic StrokeThickness that adjusts based on the current zoom level:

Zoom > 1: The StrokeThickness matches the visible connector's thickness (default: 3).
Zoom < 1: The StrokeThickness dynamically scales with the zoom factor, ensuring that the actual snapping area on the screen remains consistent regardless of the zoom level.
The StrokeThickness is doubled at smaller zoom factors to improve the responsiveness.

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated
• This PR contains no files larger than 50 MB

Release Notes

Improved connector snapping at lower zoom levels for Pin and Watch buttons.

Reviewers

@QilongTang
@reddyashish

FYIs

@dnenov

[github-actions]

See the ticket for this pull request: https://jira.autodesk.com/browse/DYN-7839

[github-actions]

UI Smoke Tests

Test: success. 11 passed, 0 failed.
TestComplete Test Result
Workflow Run: UI Smoke Tests
Check: UI Smoke Tests

[QilongTang]

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[QilongTang]

hi @ivaylo-matov Would love more time reviewing this PR, curious about the performance impact of the second connector here. Given this change would affect every connector, would you make some time comparison in bigger graphs?