Add PHP library to Community Resources List

[ghost]

(Refering to #108 (comment))

Ratelimits Handling:
All API requests get queued and pushed into endpoint-specific buckets. Each bucket gets processed sequentially, preventing any further processing after a ratelimit hit (or remaining=0). If a bucket reaches zero remaining requests or a HTTP 429 gets received, any further processing will be suspended until the reset time got reached. Hitting a global 429 will prevent any requests running after hitting to be suspended until the reset time got reached.

Source code is live at: https://github.com/CharlotteDunois/Yasmin
Most part of the ratelimiting gets done here: https://github.com/CharlotteDunois/Yasmin/blob/master/src/HTTP/APIManager.php#L237-L303
Ratelimits get parsed here: https://github.com/CharlotteDunois/Yasmin/blob/master/src/HTTP/APIManager.php#L379-L411

[msciotti]

We can certainly take a look at your library and we very much appreciate your contribution to our development community! It will take some time to look and review properly and decide if we want to add more libraries. Thanks for the PR, feel free to leave it open, and we will get to it!