samples: cellular: Add nRF Cloud gateway sample

Migrate sample from nRF Cloud repo to nRF Connect SDK.

Replace old cloud interface from ATv1 with MSS.

Get to run on NCS 2.9.0.

Jira: IRIS-9993

Signed-off-by: Pete Skeggs <peter.skeggs@nordicsemi.no>

samples/cellular/nrf_cloud_ble_gateway/.gitignore

@@ -0,0 +1 @@
+certs

samples/cellular/nrf_cloud_ble_gateway/CMakeLists.txt

@@ -0,0 +1,67 @@
+#
+# Copyright (c) 2024 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+cmake_minimum_required(VERSION 3.20.0)
+
+set(BOARD_ROOT ${CMAKE_CURRENT_LIST_DIR})
+
+set(spm_CONF_FILE
+    prj.conf
+    ${CMAKE_CURRENT_SOURCE_DIR}/${BOARD}_spm.conf)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(nrf_cloud_ble_gateway)
+zephyr_compile_definitions(PROJECT_NAME=${PROJECT_NAME})
+
+# Include certs files if enabled.
+zephyr_include_directories_ifdef(CONFIG_NRF_CLOUD_PROVISION_CERTIFICATES certs)
+
+# NORDIC SDK APP START
+target_sources(app PRIVATE src/main.c)
+target_sources(app PRIVATE src/application.c)
+target_sources(app PRIVATE src/cloud_connection.c)
+target_sources(app PRIVATE src/message_queue.c)
+target_sources(app PRIVATE src/temperature.c)
+target_sources(app PRIVATE src/fota_support.c)
+target_sources(app PRIVATE src/led_control.c)
+target_sources(app PRIVATE src/sample_reboot.c)
+target_sources(app PRIVATE src/shadow_config.c)
+
+if(CONFIG_LOCATION_TRACKING)
+target_sources(app PRIVATE src/location_tracking.c)
+endif()
+
+if(CONFIG_COAP_SHADOW)
+target_sources(app PRIVATE src/shadow_support_coap.c)
+endif()
+
+if(CONFIG_COAP_FOTA)
+target_sources(app PRIVATE src/fota_support_coap.c)
+endif()
+
+if(CONFIG_NRF_PROVISIONING)
+target_sources(app PRIVATE src/provisioning_support.c)
+endif()
+
+# Include modem-specific features if supported
+if(CONFIG_NRF_MODEM_LIB)
+	target_sources(app PRIVATE src/at_commands.c)
+endif()
+
+if (CONFIG_NRF_CLOUD_GATEWAY)
+    target_sources(app PRIVATE src/ble/ble.c)
+    target_sources(app PRIVATE src/ble/ble_codec.c)
+    target_sources(app PRIVATE src/ble/ble_conn_mgr.c)
+    target_sources(app PRIVATE src/ble/gateway.c)
+    target_sources_ifdef(CONFIG_SHELL app PRIVATE src/ble/cli.c)
+    target_sources_ifdef(CONFIG_GATEWAY_BLE_FOTA app PRIVATE src/ble/dfu/peripheral_dfu.c)
+    target_sources_ifdef(CONFIG_FLASH_TEST, app PRIVATE src/ble/flash/flash_test.c)
+    zephyr_include_directories(src src/ble src/ble/flash src/ble/dfu)
+    #add_subdirectory(src/ble/dfu)
+    add_subdirectory(src/ble/flash)
+endif()
+
+# NORDIC SDK APP END