feat: add ref to modal

[illiteratewriter]

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#2089

• [ ] Bug fix
• [ ] New feature
• [ ] Chore
• [ ] Breaking change
• [x] There is an open issue which this change addresses
• [x] I have read the CONTRIBUTING document.
• [x] My commits follow the Git Commit Guidelines
• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
  • [ ] I have updated the documentation accordingly.
• [ ] My change requires a change to Typescript typings.
  • [ ] I have updated the typings accordingly.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.

[aaronmars]

It seems like the pattern throughout the library is to use the innerRef pattern instead. I'm not defending that pattern (I think this forwardRef / ref pattern is the best and recommended way to go). I'm just wondering if this is the right place to introduce a new way of handling refs? Perhaps a larger effort to switch patterns with a breaking change?

[illiteratewriter]

This can be merged along with #2695 I guess.