Add Bluetooth examples

Co-authored-by: Peter Harper <77111776+peterharperuk@users.noreply.github.com>

pico_w/wifi/blink/CMakeLists.txt

@@ -0,0 +1,14 @@
+add_executable(picow_blink
+        picow_blink.c
+        )
+
+target_link_libraries(picow_blink
+        pico_stdlib              # for core functionality
+        pico_cyw43_arch_none     # we need Wifi to access the GPIO, but we don't need anything else
+        )
+
+# create map/bin/hex file etc.
+pico_add_extra_outputs(picow_blink)
+
+# add url via pico_set_program_url
+example_auto_set_url(picow_blink)

pico_w/wifi/blink/picow_blink.c

@@ -0,0 +1,22 @@
+/**
+ * Copyright (c) 2022 Raspberry Pi (Trading) Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include "pico/stdlib.h"
+#include "pico/cyw43_arch.h"
+
+int main() {
+    stdio_init_all();
+    if (cyw43_arch_init()) {
+        printf("Wi-Fi init failed");
+        return -1;
+    }
+    while (true) {
+        cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, 1);
+        sleep_ms(250);
+        cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, 0);
+        sleep_ms(250);
+    }
+}