Precompile Architecture

[naure]

Add the capability to support precompiles in the stack. Demonstrate with one precompile.

• Precompile Trace Generation. #728
  • Including guest-side helper function.
• Precompile Dummy Circuit #727
• Demo precompile as firmware. #729

[matthiasgoergens]

I suggest to demonstrate with a hash.

We will want to overhaul how the emulator handles ecalls. At the moment it seems to hardcode that every ecall gets to read a fixed number of registers? At least that's what the comments seem to imply.

[lispc]

seems a big task. Better to add some estimate dates of important sub tasks. @naure