Implement a pipeline for processing thermal imagery

[spwoodcock]

• Lots worked out in the field recently.
• The processing pipeline should be document and then implemented as either:
  • A flag for processing - by the user.
  • Or automatically detected - in theory possible.

[linear]

TECH-1117

[spwoodcock]

Documented in this repo: https://github.com/hotosm/freetown-uhi

To be implemented.