klessydra/Morph ? reverse-engineered prompt

I want to get this Klessydra Morphing Processor project into a working, easy to follow state.

Please inspect the VHDL sources and make sure the repo is complete and buildable, with the morphing behavior working as described in the README. The core should behave like a multithreaded processor when all three harts are active, switch into the lower thread modes when fewer harts are active, and keep the logic for hazards, branch handling, and context switching behaving sensibly. If anything is missing or broken, fix it and wire the files together so it is clear how to synthesize or simulate it.

Also make the README more practical, with simple setup and usage steps for someone following along from scratch, including how this relates to PULPino Klessydra. If you need to check current docs or examples online, go ahead and do that.