[CHECKLIST] Streamline Repo for DX Consistency

[tbraun96]

Tasks

After this epic is concluded, we will be able to confidently proceed forward with further, more challenging blueprints such as MPC with minimal additional complexity due to how the code currently works.

• [TASK] Cleanup/refactor the blueprint manager code #277
• [TASK] Improve keystore usage with a single point of entry and clear doc usage #278
• [TASK] Add pipeline step of integration testing to enforce code consistency #279
• [TASK] Add docs showing how to test a blueprint #280
• [TASK] Remove the current method of replacing blueprint.json with blueprint-test.json #281