* cannon: Copy over singlethreaded impls as a starting point

* cannon: Update mips property access to work with MTState

* cannon: Add new syscall constants

* mt-cannon: Implement clone syscall

* mt-cannon: Implement remaining new syscalls

* mt-cannon: Implement thread traversal changes to mipsStep()

* mt-cannon: Add logger, log when max steps reached

* mt-cannon: Implement onWaitComplete()

* mt-cannon: Implement thread manipulation methods

Also, use slices of pointers for the thread stacks

* mt-cannon: Move thread traversal fns to mips.go

* mt-cannon: Fix issue where wakeup traversal never stops

* mt-cannon: Fix issue where we can end up popping an empty stack

* mt-cannon: Move thread definitions to new thread.go file

* cannon: Add compile-time type checks for FPVM(State) impls

* mt-cannon: Add new threaded StackTracker

* mt-cannon: Update proof generation to include thread proof

* mt-cannon: Move FPVM compile-time type check

* cannon: Run common vm tests across all FPVM impls

* cannon: Cut OpenMIPS clone test

* cannon: Cleanup - fix some discrepancies, clarify constant

* cannon: Disable mem profiling in op-program instead of patch.go

* cannon: Consolidate calls to program.PatchGo

* cannon: Disable program.PatchGo in MTCannon tests

* mt-cannon: Add multithreaded program test

* cannon: Only run sleep check for single-threaded cannon

* op-program: Update profiling before dependency init fns are called

* mt-cannon: Track stack on thread clone, handled popped threads

* mt-cannon: Panic if unrecognized syscall is executed

* mt-cannon: Panic if unexpected flags are passed to SysClone

* mt-cannon: Add some tests for EncodeThreadProof()

* mt-cannon: Add some more tests around threadProof edge cases

* mt-cannon: Minimize logging

* cannon: Update go version in cannon/example/multithreaded/go.mod
Co-authored-by: Inphi <mlaw2501@gmail.com>

* mt-cannon: Rework clone behavior based on feedback

* mt-cannon: Rework wakeup logic

* mt-cannon: Cleanup - simplify clone, refine logging

* Revert "cannon: Cut OpenMIPS clone test"

This reverts commit d876d6a44ffc01672a019d5b2411e7d3eab08439.

* mt-cannon: Skip open-mips clone test add todos

* mt-cannon: Handle munmap syscall

* mt-cannon: Exit if the last thread exits

* cannon: Clarify skip comment

* cannon: Add some todos

* cannon: Add guard around logging

---------
Co-authored-by: Inphi <mlaw2501@gmail.com>