feat: Implement a bbolt backed secrets store.

pkg/secretsstore/err.go

@@ -0,0 +1,10 @@
+package secretsstore
+
+import "errors"
+
+var (
+	ErrInvalidStore      = errors.New("the store backing storage is corrupted or invalid")
+	ErrKeyDoesNotExist   = errors.New("the requested key does not exist in the store")
+	ErrCouldNotStoreKey  = errors.New("was not able to store the value in the provided key")
+	ErrCouldNotDeleteKey = errors.New("key was not deleted")
+)