Pretty print request bodies

[visola]

User Story

As a user, I want to easily understand the payloads sent and received.

Acceptance Criteria

• [ ] There's an extra tab that the user can click to see the prettier version of the body
• [ ] The following formats should be pretty printed
  • [ ] JSON
  • [ ] HTML Forms
  • [ ] XML
  • [ ] HTML
  • [ ] Javascript
  • [ ] CSS
• [ ] All image formats should show as image

Depends on

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