FEAT: Converter Panel for GUI!

[jbolor21]

Description

Adding converter panels to the GUI interface! This PR only lets you run ONE converter per turn per type of media (ie you can do an image + text conversion in same turn but not two text conversions in one turn)

• Created converter panel where you can select converter
• Each converter shows a description of the converter & its parameters (note only simple parameters are editable with UI)
• Visual badges for see which converters use an LLM - these LLMs will NOT automatically render a preview but will if you click "preview". The rest will auto show the preview!
• Converter panel uses tabs to let you select which modality you want converter on and filters list based on your input type

Tests and Documentation

• Manual testing with the UI
• Frontend unit tests pass (npx jest) & added new e2e tests for new functionality
• Added unit tests & ensured all unit tests pass

Images:
(new button is shown):

(new panel)

(panel dropdown)

(once you've selected converter)