ci: setup cache

[rajveermalviya]

No description provided.

[almarklein]

There's some formatting so its a bit hard what code actually changed, but I think you only added these blocks, right?

- name: Setup caching
        uses: Swatinem/rust-cache@v2
        with:
          key: build-${{ env.TARGET }}-${{ env.CACHE_SUFFIX }}

And IIUC they cache (versioned) Rust dependencies, so the builds are faster.

[rajveermalviya]

Yeah, formatting is done via the Prettier extension from vscode. So thought I had to include it too, to make the review easier I separated them in 2 different commits.

Thanks to this caching, it reduces the workflow times significantly: after caching, before caching

[almarklein]

to make the review easier I separated them in 2 different commits.

Ah! Nice thinking, I missed that initially, but very clear indeed 👍

Nice speedup!