FEATURE: Open mysql/mariadb, postgresql, sqlite

[tctlrd]

I would love to directly open databases via this wonderful app. Currently I host my Gnucash database on a mariadb server and it would be very nice to access and write to it directly via this app. It would also be great directly open and write to sqlite files on one's android user storage and access any posgresql or mysql database server. This is the standard functionality of Gnucash and Gnucash-Web does the same.