feat: chameleon, a tool for language binding generation

[c-dilks]

This introduces chameleon, a tool to automate generation of bindings and action function tests. For a proof of concept, this PR generates the C bindings for Fortran.

[rtysonCLAS12]

Sorry I took so long to review, I forgot about this!
I checked the Action.yaml files, they have the right entries for each action function.

Should the ExampleAlgorithm have an Action.yaml file? This could point to the action function Filter , I think it would be helpful to refer to when writing algorithms.

[c-dilks]

Should the ExampleAlgorithm have an Action.yaml file? This could point to the action function Filter , I think it would be helpful to refer to when writing algorithms.

Yes, but I'm actually considering removing ExampleAlgorithm with #141, in favor of choosing three representative algorithms (a filter, a transformer, and a creator) that would serve as good examples, and moving the descriptive comments to those. Then I'll add links to those in the documentation.

[rtysonCLAS12]

OK sounds good