Add TimothyStiles/poly

[carreter]

ℹ️ Repository information

The repository has:

• [x] At least three issues with the good first issue label.
• [x] At least 10 contributors. Only 3 people are particularly active, but we've had dozens of contributors make small changes.
• [x] Detailed setup instructions for the project.
• [x] CONTRIBUTING.md
• [x] Actively maintained.

Here's our issues page: https://github.com/TimothyStiles/poly/issues

[carreter]

@TimothyStiles and @Koeng101 for visibility.