Since single-row queries are performed rapid-fire during certain actions like
stepping through the symbol browser, there is high value in caching them for
a small amount of time. The default cache parameters will keep results for
10 seconds, which errs on the side of getting fresh data from the database
on most user interactions.
Allows placing parts from an external database that reference symbols from another loaded library.
Includes:
- nanodbc wrapper
- database schematic library plugin
- basic tests
Fixes https://gitlab.com/kicad/code/kicad/-/issues/7436
Jon Evans