Refactor internal package organization

[kate-osborn]

Proposed changes

Refactors the internal package organization to better reflect the purpose of the code.

Problem: After the merge of the provisioner-mode code into the main branch commit, our codebase now consists of three distinct components or groups: provisioner-mode, static-mode, and framework. However, our current internal package structure does not align with these components.

Solution: Align the internal package structure with our three main components by introducing the following internal packages:

• framework: code shared between provisioner and static modes
• mode/provisioner: all code related to provisioner-mode
• mode/static: all code related to static mode
  Some packages were refactored/split so the framework package would not have any dependencies on the mode/static package.

Testing: Made sure unit tests and conformance tests still pass. Ran through the installation doc.

Closes #709

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[pleshakov]

👍