v0.8.0: interface annotations in local catalogs, tidier catalog page

- Catalogs generated from directories, the cache or fmufile.txt record the
  fmi.signal-manifest, osp.model-description and osp.variable-groups
  annotations that fmus push records, so search --catalog -a and the
  catalog filters find local FMUs by OSP group type
- fmi.signal-manifest is a documented annotation key
- Catalog filters ordered by how one narrows down FMUs, with the less
  used ones behind "More filters" and at most six values per topic
- FMU cards show the essentials at once; further SRMD entries, check
  reports, interface changes and technical details fold out
- A card's links on one line, including SRMD entries that are links
- The OSP model description badge reads OSP-IS
- fmus connections leaves the FMU out of its own connections also when
  given by a relative path
- Documentation of the catalog page, and updated OpenWiki