feat: search cmd

chore: raw sql replaced with squirrel
fix: -n is now required for add cmd

internal/errors/errors.go

@@ -7,4 +7,6 @@ var (
 	ErrInsufficientArgs = fmt.Errorf("mandatory args are missing")
 	ErrFailedToCast     = fmt.Errorf("failed to cast spell")
 	ErrNoDBProvided     = fmt.Errorf("no db provided")
+	ErrNotFound         = fmt.Errorf("not found")
+	ErrEmptyQuery       = fmt.Errorf("empty search query")
 )