Add development guidelines

[marcuscollins]

As the project grows we need to establish some standards and practices for development.

[marcuscollins]

Needs to include:
-lessons from integrating Protpardelle
-- build and merge the environment first
-- build a skeleton of the code first, just a mock up that returns the unmodified structure
-- then build out the actual code
-how to evaluate whether a feature is useful (i.e. how to do evaluation, how to present results, what is the decision process)

[marcuscollins]

Look for and remove any blocks in the code about type hints, e.g. in src/sampleworks/core/scalers/latent_optimization.py