Adjust directory structure

.vscode/settings.json

@@ -0,0 +1,40 @@
+{
+    "files.associations": {
+        "xs_adapter_manager.h": "c",
+        "xs_adapter_at_nbiot.h": "c",
+        "xs_klist.h": "c",
+        "user_api.h": "c",
+        "xs_adapter_def.h": "c",
+        "xs_adapter_at_agent.h": "c",
+        "xs_adapter_at.h": "c",
+        "bus_serial.h": "c",
+        "xs_adapter_at_wifi.h": "c",
+        "dev_serial.h": "c",
+        "xs_adapter.h": "c",
+        "stdbool.h": "c",
+        "xs_base.h": "c",
+        "stddef.h": "c",
+        "ostream": "cpp",
+        "sensor.h": "c",
+        "string.h": "c",
+        "adapter.h": "c",
+        "array": "c",
+        "chrono": "c",
+        "functional": "c",
+        "istream": "c",
+        "ratio": "c",
+        "tuple": "c",
+        "type_traits": "c",
+        "utility": "c",
+        "string_view": "c",
+        "stm32f4xx.h": "c",
+        "extmem.h": "c",
+        "system_stm32f4xx.h": "c",
+        "core_cm4.h": "c",
+        "stdint.h": "c",
+        "board.h": "c",
+        "connect_usart.h": "c",
+        "device.h": "c",
+        "xiuos.h": "c"
+    }
+}