Support dense Qwen3 generation in EMLXAxon (#119)

* feat: add dense qwen3 generation to EMLXAxon

* Update emlx_axon/lib/emlx_axon/qwen3/generate.ex

Co-authored-by: Paulo Valente <16843419+polvalente@users.noreply.github.com>

* Update emlx_axon/lib/emlx_axon/qwen3/generate.ex

Co-authored-by: Paulo Valente <16843419+polvalente@users.noreply.github.com>

* Update emlx_axon/lib/emlx_axon/qwen3/generate.ex

Co-authored-by: Paulo Valente <16843419+polvalente@users.noreply.github.com>

* Update emlx_axon/lib/emlx_axon/qwen3/generate.ex

Co-authored-by: Paulo Valente <16843419+polvalente@users.noreply.github.com>

* Address text generation style feedback

* Use microsecond timing for Qwen3 profiling

* Update emlx_axon/lib/emlx_axon/qwen3/dense_loader.ex

Co-authored-by: Paulo Valente <16843419+polvalente@users.noreply.github.com>

* Simplify Qwen3 dense parameter lookup

* Rename Qwen3 quantized attention path

* Leave dense Qwen3 state evaluation lazy

* Keep Qwen3 greedy sampler generic

* Isolate Qwen3 native accelerators

* Inline Qwen3 native error returns

* Move Qwen3 native code under emlx_fast

* Move memory include to Qwen3 source

---------

Co-authored-by: Paulo Valente <16843419+polvalente@users.noreply.github.com>

Author: hfiguera

emlx/Makefile

@@ -47,8 +47,8 @@ endif
 MAKE_JOBS ?= $(MAKE_DEFAULT_JOBS)
 
 # Source files
-SOURCES = c_src/emlx_nif.cpp c_src/emlx_fast.cpp
-HEADERS = c_src/nx_nif_utils.hpp c_src/emlx_worker.hpp c_src/emlx_async.hpp c_src/emlx_nif_shared.hpp
+SOURCES = c_src/emlx_nif.cpp c_src/emlx_fast.cpp c_src/emlx_fast/qwen3.cpp
+HEADERS = c_src/nx_nif_utils.hpp c_src/emlx_worker.hpp c_src/emlx_async.hpp c_src/emlx_nif_shared.hpp c_src/emlx_fast/qwen3.hpp
 OBJECTS = $(patsubst c_src/%.cpp,$(call esc,$(BUILD_DIR))/%.o,$(SOURCES))
 
 # Main targets
@@ -59,7 +59,7 @@ $(call esc,$(PRIV_DIR)):
 	@ mkdir -p "$(PRIV_DIR)"
 
 $(call esc,$(BUILD_DIR))/%.o: c_src/%.cpp $(HEADERS)
-	@ mkdir -p "$(BUILD_DIR)"
+	@ mkdir -p "$(dir $@)"
 	$(CXX) $(CFLAGS) -c "$<" -o "$@"
 
 $(call esc,$(MLX_SRC_ARCHIVE)):

emlx/c_src/emlx_fast.cpp

@@ -640,3 +640,4 @@ NIF(kv_cache_sdpa_update) {
   CATCH()
 }
 ASYNC_NIF(kv_cache_sdpa_update)
+