Support for some basic Python testing.
Handling of loading error with proper error propagation.

Including the execution of some simple tests.

Fixes an issue related to clap_lex a wasm-pack dependency.

Fixes issue with node 20.

This dependency was creating issues with clap>=4.

This allows automated CI/CD for production deployments.
Major development effort .

This reverts commit e252646f.

Added more Rust versions