Make file path selection more interactive

**Is your feature request related to a problem? Please describe.**

Users will often have to manually set very long paths to their cohort data. It has been a pain point for certain lab members who have deeply nested subdirectory structures.

**Describe the solution you'd like**

`ipyfilechooser` is a module that can be used to simplify this process. For `base_dir`, where some users are on Docker and most users use a `conda` environment, this will especially be helpful.

The example below is for a file selection, but you can also do folder selection by hitting `Select` after navigating inside the desired directory.

https://github.com/angelolab/ark-analysis/assets/31424707/72dbb055-3387-4514-a21e-ac0294b7ba75