move issue tracking/contribution workflows/project management to awesome-selfhosted-data (#4083)
- ref. https://github.com/awesome-selfhosted/awesome-selfhosted-data/issues/33
- ref. https://github.com/awesome-selfhosted/awesome-selfhosted-data/issues/11
- ref. https://github.com/awesome-selfhosted/awesome-selfhosted/issues/1038
