Collection: Make sure RunQuery does not access collection items

- Rename `QueryOptions` to `CollectionFilterOptions`.
- Create new class `CollectionQueryOptions` for passing options from model to `CollectionQuery`.
- Rename `Directory` to `CollectionDirectory`.

Fixes #1095

src/collection/collectionqueryoptions.cpp

@@ -0,0 +1,34 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2023, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QVariant>
+#include <QString>
+
+#include "collectionqueryoptions.h"
+#include "collectionfilteroptions.h"
+
+CollectionQueryOptions::CollectionQueryOptions()
+    : compilation_requirement_(false),
+      query_have_compilations_(false) {}
+
+void CollectionQueryOptions::AddWhere(const QString &column, const QVariant &value, const QString &op) {
+
+  where_clauses_ << Where(column, value, op);
+
+}