Add metadata to indexes (#118)

* Add metadata for howto index (to L322)

* Update to new format

* remove old tags

* remove unnecessary page components, format

* add array to old metadata tag

* fix titles, remove extra page components, add more descriptive titles to source pages

* typo fix

* typo fix

* Add some more metadata

* All the rest \o/

* remove mentions of mst

Co-authored-by: Jacob <prall.jacob@gmail.com>