Add Iconify support

[ynaka81]

📑 Summary

Support Iconify icon packs that are used in architecture-beta.

Resolves #764, #805

📏 Design Decisions

I have the same issue described in the #764 and #805. I think it makes sense to add the way similar as the comment #764 (comment) to the upstream because it doesn't have any side effect if it's lazy load.
Although it might be reasonable to support any icon packs with a command line option, it would be good to support commonly used logos and mdi first as Markdown Preview Mermaid Support supports them.

📋 Tasks

Make sure you

• 📖 have read the contribution guidelines
• 💻 have added unit/e2e tests (if appropriate)
• 🔖 targeted master branch

[aloisklink]

Looks perfect to me! Thanks for making all of those changes 😄

Since we copy mermaid-js/mermaid release cycle (except for bugs/security issues), this will only be released the next time Mermaid has a release.

So I'll leave this PR open for a bit in case @MindaugasLaganeckas wants to review the Docker test changes.

[sumitj18s]

Thanks @ynaka81 for the effort. Could you please merge this PR to main branch. We are looking forward for this PR to fix the icons issue. I am getting ? as an icon when running mermaid-cli when accessing the aws icons, e.g., aws-s3.

[aloisklink]

@sumitj18s, I've merged this PR to master!

However, it will only be released officially the next time mermaid-js/mermaid has a release (and there's a slight but unlikely chance that we might change the API/CLI flags before the release).

[ynaka81]

Thanks for merging this PR! I'm happy to contribute to this repository. It's totally fine to change the API/CLI flags in a way that the community thinks is easier to use and I'm looking forward to the release.