Add Phix solution

[rzuckerm]

Description

Add Phix solution. Phix is based on Euphoria, so this code is almost identical to the Euphoria solution. However, it does perform differently. See the README in this PR for further details. Also, the installation process in the Dockerfile is really bizarre since this language isn't available on docker hub or as any type of Linux package.

Contributing requirements

• [x] I read the contribution guidelines in CONTRIBUTING.md.
• [x] I placed my solution in the correct solution folder.
• [x] I added a README.md with the right badge(s).
• [x] I added a Dockerfile that builds and runs my solution.
• [x] I selected drag-race as the target branch.
• [x] All code herein is licensed compatible with BSD-3.

[rbergen]

Interesting! I see your point about the Dockerfile. We do have some other jewels in the repository, although mostly indirectly. That is to say that we create separate Dockerfile repos for the more complex/time consuming Docker base image builds, and post the resulting images on Docker Hub. I think the Dockerfile for Chapel is my favorite of the ones I created.