fw: drivers: add da1468x bluetooth code

src/bluetooth-fw/da1468x/controller/main/include/ble_task.h

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdbool.h>
+
+#include <bluetooth/init.h>
+
+void ble_task_assert_is_executing_on_ble_task(void);
+
+//! Start the Dialog BLE stack with the given config and block until it's up and running.
+void ble_task_init(const BTDriverConfig *config);