[TODO] Move MIME type / KFileMetaData Type mapping from Baloo to KFileMetaData
Currently, the mapping from MIME types to KFileMetaData's Type/TypeInfo is
partially done in Baloo's BasicIndexingJob, see
https://invent.kde.org/frameworks/baloo/-/blob/master/src/file/basicindexingjob.cpp?ref_type=heads#L63
A similar mapping is also done by KFMD's extractors, which also set the
Type
for a file/document. This only applies for MIME types with with a
dedicated extractor, i.e. only applies for these MIME types, and only when
content indexing is done.
The mapping in the BasicIndexingJobs does not contain anything specific to Baloo and thus should be moved here.