[espeak-ng:master] new issue: Missing contributing guidelines #github Integration <espeak-ng@...>

[espeak-ng:master] New Issue Created by The1Freeman:
#647 Missing contributing guidelines

Currently, it is unclear on how anyone who's new to this project or anyone who wants to contribute fixes to certain words to properly edit the required files as desired, as though I was unable to find proper documentation about how a _rule file works and how to properly edit a _list file.

It would be great if there was a way of properly knowing how to submit feedback and the accompanying fixes (aside from using the issues to which the online dev version points to) as is missing a proper issues & pull request template, as well as a code of conduct to properly contribute to this project.