* Adds a very simple sample plugin for label printing
* Test mixin install status and API query
* Better error reporting for label printing API
* pep fixes
* fix assertation
* remove broken assertation
* igonre for coverage
* test the base process of printing
* refactor tests
* clean up basic test
* refactor url
* fix url creation
* test printing multiples
* test all printing endpoints
* test all list options - move api tests
* test for invalid filters
* refactor
* test with no part
* these should not happen
checks are in place upstream
* fix assertation
* do not cover continue parts
* test for wrong implementation
* ignore DB not ready
* remove covage from default parts
* fix url generation
* test debug mode
* fix url assertation
* check that nothing was rendered
Co-authored-by: Oliver Walters <oliver.henry.walters@gmail.com>
