feat(Multiple Languages): Convert EditComponentPrompt input to TranslatableInput

[hirokiterashima]

Notes

• Don't worry about styles in this PR

Changes

• Pass in ComponentContent object to EditComponentPrompt instead of just the prompt string. This lets us convert the input to TranslatableInput.
• Convert EditComponentPrompt's input to TranslatableInput

Test in AT

These should apply to all components, but you can just test with handful of components to save time (since they all use the same code in EditComponentPrompt):

• In default language, editing prompt should save as before
• Switching to a supported language using the language chooser (top-right corner of AT)...
  • shows the correct prompt text in the specified language, if it has been translated before
  • shows empty box, if it has not been translated before
  • shows the placeholder and label appear correctly
  • making changes to the prompt does nothing at the moment (saving will be implemented in the future)

[geoffreykwan]

Looks good.