HACK Since there is some weirdness with the whoosh backend for papis not
being able to either index or search for integer values in custom
fields, this commit sets the priorities across the library (as well as
the tui picker) to make use of textual reprentations.
1 -> high
3 -> medium
5 -> low
This means we can't do simple arithmetic evaluations on priority anymore
but at least we can search it correctly in papis. Should probably put in
a ticket to see if it can be fixed.
We render the priority of an entry in both table and multiline mode,
with priority >=1 being highest, >=3 being medium and everything
>5 being low priority.
We also have some maps for quickly setting the priority of an entry
from the tui:
`,ph` | `,pm` | `,pl` (for high, medium, low - so 1,3,5).
Lastly, I quickly added some to-dos that require the input of the
maintainer or some work in a fork, so I don't forget.
I also should not forget that I implemented some of them locally already
and am using them.
Unified key bindings roughly to
localleader=, anything with `,` in front will affect the current
documents somehow (e.g. mark them read, add a tag, ..).
jumpto=' prepending with `'` will affect the current view
(e.g. limit to unread documents, limit to entries with notes, ..).
Sorting can be done with `S`, like in vifm.
Display style can be toggled to table with `T`.
