Spring cleaning

[mratsim]

• Test "gemm_weave_nestable"
• Delete experiments folder
• Delete unused channels folder
• Regroup all state machines in a folder and rename them with the exported proc
  • Have all state machine file contain only a single exported proc
• Cleanup import warnings (declared but not used)
• Remove the metrics placeholder file
• introduce debugSizeAsserts for size asserts that cannot be done at compile-time due to "incomplete structs"
• revisit inline or noinline decisions (equal overhead -> no inline, otherwise inline, overhead measured with fibonacci 40 and DFS 9 9 benchmarks)
• Fix symbol visibility issues that required exposing private procs