A logo for iceberg rust!

It must be cool for iceberg rust to have it's own logo! Maybe we can have a logo that a crab eating iceberg or the iceberg is rusty.

## Notes

Unlike [python's logo](https://www.python.org/community/logos/), the crab itself is not a logo owned by [rust foundation](https://foundation.rust-lang.org/policies/logo-policy-and-media-guide/). So it's fine for us to adding a cute crab in our logo.