Add additional selection modes

[nojaf]

📝 Summary

Fixes #3624

🔍 Description of Changes

This is a WIP, but I started with adding the new selection modes to both the JavaScript and Python side.

I still need to to the actual implementation, but since I'm new to this project I could benefit from some early feedback.

Open questions:

• Where should the checkbox in the cell be positioned? What do you folks have in mind here UI-wise?
• Should initial_selection be taking into account here? Or would that remain row specific?

📋 Checklist

• I have read the contributor guidelines.
• For large changes, or changes that affect the public API: this change was discussed or approved through an issue, on Discord, or the community discussions (Please provide a link if applicable). (I believe the conversation in Propogate column information when cell selected in mo.ui.Table #3624 satisfies this)
• I have added tests for the changes made.
• I have run the code and verified that it works as expected.

📜 Reviewers

@mscolnick

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[nojaf]

I have read the CLA Document and I hereby sign the CLA