dev: syntax highlighting for EVM Assembly

[0xaatif]

The only thing this really gives us is syntax highlighting for comments.

If we want more I think we should rewrite our parser.

See #299

[Nashtare]

Thanks Aatif, I just installed and tested the extension from #674, it does highlight the comments properly as expected!
As a reference, I was previously using Arm Assembly extension (dan-c-underwood.arm) which, even though not quite adequate, is doing enough for the eyes at least.

Ideally, the long term goal of such extension would be the common convenient features offered by others.
On the top of my mind, the two main ones would be:

• documentation preview: maybe 60% of the global FOO labels and %macro BAR are documented with ///, which would be great if we could highlight these upon mouse hovering in other locations. This is probably the biggest need, especially for external contributors / auditors who have a hard time grasping everything around / navigating through the 1000s lines of code.
• distinct highlighting: for visual convenience, differentiating say opcodes (PUSH / DUP4), labels, macros, conditional blocks. Probably the easiest to have on top of the existing I would guess?
• definition redirection: really nice to have, but not highest priority, i.e. click + redirection to label / macro def location. Super convenient when going through the flow and hitting a %jump(FOO).

If you think these are doable (with or without parser refactoring), feel free to layout the iterative steps to achieve them in some tickets. The priority is definitely not as high as getting the cdk-erigon type2 up and running, but would still be really great to have.

[Nashtare]

(I can also make individual tickets for each features with additional info on what could be expected, if it's easier to reason about them that way)

[0xaatif]

@Nashtare I think you meant to comment the above under #299 :)