NAD: Snap to grid

[zamarrenolm]

Please check if the PR fulfills these requirements (please use '[x]' to check the checkboxes, or submit the PR and then click the checkboxes)

• [X] The commit message follows our guidelines
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...) Feature (experimental)

What is the current behavior? (You can also link to an open issue here) Moved nodes can not be precisely aligned

What is the new behavior (if this is a feature change)? Moved nodes can be aligned (snapped) to an underlying grid

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[flo-dup]

Closing as

• we should still clarify if this nice feature is of interest for the current identified users
• the moving feature is now developed in powsybl-diagram-viewer repository