Add new QingStor remote

Add new package qingstor to support QingStor API.

Add new unit test for its and tested through; But I commented
on some tests case because of some of the features of QingStor.

Add new docs for it.
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Internal Server Error - Gitea: Git with a cup of tea
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Gitea Version: 1.28.0+dev-477-g8b6ad49a5f