Refactor i/o assembly instructions about miden-vm

[bobbinth]

I updated assembly specs to reflect the above changes. One thing I changes: I got ride of pushw and allowed removing periods between values in hexadecimal format: https://hackmd.io/YDbjUVHTRn64F4LPelC-NA?#Constant-inputs.

Also, increased the maximum value of the parameter for push.adv to 16.

[grjte]

I'm updating this in 4 stages:

• 1. refactor i/o operations to "what.where" format + update tests (no change to how push is handled for constants)
• 2. update push handling for constants to the new specs + update tests for push with constant inputs
• 3. add handling for locals (io_ops + procedure parsers) + add tests
• 4. add integration tests to the processor for io operations

[bobbinth]

Closed by #117