Create using_help_annotations_correctly.md

Author: DeveloperTryingToCodeLikeOtherOfThem

docs/using_help_annotations_correctly.md

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+## Using help annotations
+
+Whenever using help annotations, please see these 3 steps below.
+
+1. Make sure you first write `github:`, so MakeCode knows to fetch a repository on GitHub
+2. Write the repository's name **without any spaces after writing the colon**
+3. Add a slash command to tell the compiler to read a specific file in the repository
+4. If it is a folder in a repository, write the folder's name and then another slash command
+5. Finally, add the file's name (**the file's path must be right or it will not be load**)
+6. Also, make sure to **not** add .md in the end of the file path because MakeCode already reads doc files as markdown files.