Add search option for "contains any text separated by ORs"

[fedarko]

progress

• implement initial version of code
• add basic tests
• add corner-case tests (e.g. no |s)
• either fix or document trimming discrepancy with normal text searching in no |s case
  • For reference: in normal text searching, whitespace (even surrounding whitespace) isn't removed. However, in this searching mode, we trim whitespace around the search options: so using e.g. abc | def | ghi|jk as your input text searches for matches against abc, def, ghi, jk.
• document -- this would be good to mention in moving pictures tutorial, can select multiple arrows at once by separating their IDs with |s)

description

Searching name is subject to change.

Essentially, this would let you search by multiple possible arbitrary substrings, without the limitations inherent to the current separated text fragment searching. The inputs would be separated by ORs, similar to SQL queries?

An example input string would be

g__thing; s__speciesname OR s__coli OR p__Proteobacteria

And any features with taxa containing g__thing; s__speciesname, or s__coli, or p__Proteobacteria would match. (We could just split up the input query by ORs, then trim off any surrounding whitespace from each substring.)

This would need to be properly documented (#123), but it's a much more natural way to search through multiple features at once than the current "contains the separated text fragment(s)" option. This is essentially another way of coming at #140, but I think this is much more doable in the short-term (and honestly it might be a bit more intuitive).

This would solve the case where you have polyphyletic taxa, e.g., the same species name in different genera—the current searching methods in Qurro are not fully equipped to handle that situation (you can search for a particular species using the "contains the text" searching option, but if you want to search for multiple features at once this isn't possible). An example of the "same species name in different genera" problem is e.g. P. gingivalis and H. gingivalis.

Thanks @lisa55asil for bringing this issue to my attention!