Metadata component design and implementation with indexing strategy

This is only for a first syntactic approach for intrinsic metadata with a fish for file names listed in P154 and parse content to json

Note:

In a later task will be to implement semantic translation of intrinsic metadata where the translation will be stored in a higher level table with a column for each term (resembling to entity)
Also a extrinsic strategy will be added to the mix

design:

• sequence chart for indexing metadata
• table design to add to database