P1 Data integrity tests

[bdhrs]

Formal data integrity tests for the information contained in
Pāli English Dictionary-full.csv and Pāli English Dictionary-vocab.csv

A few thoughts, must be able to

1. run offline so data can be cleaned before uploading to github
2. add new tests quite easily, as this happens on a regular basis. being able to use regex would help as i understand it.
3. run hard tests which fail and soft tests which just show results
4. have exclusion lists for known irregular words.

@parthopdas wrote an Anki filter export - this is currently where the data gets reviewed on a daily basis, and manual (i.e fallible) data integrity tests are run, 162 in total at the moment. Here is that file as a reference.

saved_filters.json.zip