Patch highlighter for Cairo when building with scarb-mdbook

[maciektr]

Patch highlighter for Cairo when building with scarb-mdbook

Fix corelib docs deploy workflow

Update docs

[maciektr]

This change is part of the following stack:

• Add mdbook builder as extension #2140
  • Patch highlighter for Cairo when building with scarb-mdbook #2141 ◀
    • Mark code blocks as Cairo not Rust #2142
      • Update docs to mention building with --build arg #2143

_{Change managed by git-spice.}