AGNI: An open-source model for extreme atmospheres on rocky exoplanets

What's Changed

• Deep heating functionality with gaussian energy profile injection into atmosphere layers
• Improve test coverage by @nichollsh in https://github.com/nichollsh/AGNI/pull/169
• Rework AGNI docs to Diataxis structure by @nichollsh in https://github.com/nichollsh/AGNI/pull/170
• Updated hydrostatic-gravity integrator for stability and performance improvements
• Improvements to grid functionality
• Tidied up git history, which substantially reduces repo size
• Added more default elements
• New options for changing how 'convergence' of the model is defined (default behaviour unchanged)

Full Changelog: https://github.com/nichollsh/AGNI/compare/1.8.1...1.8.9