Fix the rendering erros in the Miden Assembly Instruction tab

[Dominik1999]

In the Miden Playground (playground.miden.io) we have the Instructions tab. There are multiple formatting errors in the table. Our ideal state is that we show all Assembly instructions from the Miden VM docs in the same cool way as EVM codes.

1. The description of some instructions is not rendered correctly:
   

2. For some instructions, there should be a new line if two different ways are described, e.g., adv.push_mapval and adv.push_mapval.s is the same instruction (must be in the same row), but one is a short cut for adv.push_mapval s
   

3. I don't know if all the instructions are there. We should scan the following folders Assembly Instructions. Then, when we find a table with instructions we should add it to the JSON here. There is already a file that does that, but I am not sure it catches all the instructions, see here.