Interfaces refactoring

[israelmcmc]

Work in progress...

This is a major refactoring of cosipy to make it more modular, using interfaces (protocols) to decouple the inputs/outputs of different classes from their implementation.

There are currently three examples that serve as an entry point to see the interfaces usage:

• docs/api/interfaces/examples/toy: A generic 1D fits of a Gaussian signal on top of a flat background
• docs/api/interfaces/examples/grb: Equivalent to the GRB spectral fit tutorial
• docs/api/interfaces/examples/crab: Equivalent to the Crab spectral fit tutorial

Presentations:

20250630-CosipyInterfacesUpdate-Israel.pdf (at version 214f2ae)

Installation notes and troubleshooting:

• You need to install this histpy versions from source (branch time_axis): https://gitlab.com/burstcube/histpy/-/tree/time_axis
• need to copy crab.yaml and background.yaml in the repository or add it on wasabi in cosipy_tutorial

TODO list:

• Binned analysis toy example
• GRB spectral fit (using dwel time map / local coordinates)
• Crab spectral fit (using scatt map / galactic coordinate)
• Unbinned analysis toy example
• Extended source response
• Propagate to source injector
• Propagate to TS map
• Propagate to imaging deconvolution
• Merge with Jeremy's and other recent PRs
• Update all notebooks
• Fix all tests