Add options

[bertspaan]

Add options:

• Styling
• Custom icons
• Etc.

[bertspaan]

Options:

• [x] Read-only
• [x] Styling
  • [x] Field-of-view triangle
  • [x] Camera icon
  • [x] Target icon
• [x] Camera control
  • [ ] Which buttons?
  • [ ] Which keys?