feat: 2D config preset table

[tlambert03]

proof of principle of the 2D table that @marktsuchida was describing in https://github.com/pymmcore-plus/pymmcore-widgets/pull/307#issuecomment-2220753569

would still need:

• [ ] ability to add a new row (a new dev/prop that all presets should set)
• [ ] ability to add/remove columns (to add/remove presets)
• [ ] editable column headers (to rename a preset)
• [ ] deal with jagged config groups (where not all presets have the same dev/props)

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 177 lines in your changes missing coverage. Please review.

Project coverage is 89.01%. Comparing base (1cda2b7) to head (92fb2f8).

Files with missing lines	Patch %	Lines
src/pymmcore_widgets/_config_preset_table.py	0.00%	177 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #320 +/- ## ========================================== - Coverage 90.71% 89.01% -1.71% ========================================== Files 85 86 +1 Lines 9234 9411 +177 ========================================== Hits 8377 8377 - Misses 857 1034 +177 ```

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