Refactor: Separate interface from HWI calls and add HWI binary support

[ben-kaufman]

Changes

• Separated the interface from the Python dependent implementation
• Created a new module structure to support multiple implementations for making HWI calls
• Added a binary implementation alongside the existing Python implementation allowing to interact with HWI using a binary file

Benefits

• Increased modularity and flexibility
• Allows for easy addition of new implementations in the future
• Maintains compatibility with existing Python implementation while introducing binary support

Fix #92 by allowing to use rust-hwi with a binary file that can be easily packaged inside a consumer directed desktop app.