Get the content of a single file by its relative path within the shelf. The filePath may contain slashes for nested files (e.g. chapter-1/section-1.md). Content-Type is text/markdown for .md files, application/json for .json files, or text/plain otherwise.
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
^shf_[0-9a-f]{24}$Relative file path within the shelf (may contain slashes)
"chapter-1/section-1.md"
File content
The response is of type string.