feat: Implement a bbolt backed secrets store.

pkg/secretsstore/store.go

@@ -9,7 +9,12 @@ type SecretsStore interface {
 	Delete(key Key) error
 }
 
-func New(path string) SecretsStore {
-	// TODO: Actually instantiate the struct.
-	return &bboltStore{}
+// New returns a SecretsStore that uses the file at path for storage.
+// path is created if it doesn't exist.
+func New(path string) (SecretsStore, error) {
+	bstore, err := newBboltStore(path)
+	if err != nil {
+		return nil, err
+	}
+	return bstore, nil
 }