IGPUs are ignored

[OtherCrashOverride]

When using a device with an IGPU, such as Ryzen APUs, the IGPU is ignored during backend selection.

The following enables IGPU selection:

diff --git a/src/backend.cpp b/src/backend.cpp
index 88e2c8b..7eb9e33 100644
--- a/src/backend.cpp
+++ b/src/backend.cpp
@@ -79,7 +79,9 @@ Backend::Backend(int n_threads) : impl_(new Impl()) {
         // single path covers them all with no backend-specific includes.
         for (size_t i = 0; i < ggml_backend_dev_count(); ++i) {
             ggml_backend_dev_t dev = ggml_backend_dev_get(i);
-            if (ggml_backend_dev_type(dev) == GGML_BACKEND_DEVICE_TYPE_GPU) {
+           auto temp = ggml_backend_dev_type(dev);
+            if (temp == GGML_BACKEND_DEVICE_TYPE_GPU ||
+               temp == GGML_BACKEND_DEVICE_TYPE_IGPU) {
                 impl_->backend = ggml_backend_dev_init(dev, nullptr);
                 if (impl_->backend) {
                     device_name_ = ggml_backend_dev_name(dev);

It would also be beneficial to allow the "PARAKEET_DEVICE" environment variable to specify the backend such as "CUDA0" or "Vulkan1" instead of just "cpu" as is currently authored.

[mudler]

covered in #20