-Initial implementation, has bugs

Add text based filtering to showcase vs ID filtering
Design is still a WIP

Use SearchEntry for text search and SpinButton for
ID search and subsequent logic changes
Cleaned up logic when no results found
Re-organized the UI, cleaner implementation

rename folder to Database
change description, title
replace var with let
add newline

remove Toasts and subsequent use
temporarily disable closeDatabase function for checker
use sqlite databse

can't leave the adapter open