include webgpu.yml on packaging (#435)

* Add webgpu.yml to distribution directory

Included webgpu.yml file in the distribution process to ensure specifications are packaged alongside other required files. This change guarantees that all necessary resources are available during deployment and usage.

* Create `specifications` directory in archive stage

Added a command in the Makefile to create the `specifications` directory during the archive preparation phase. This ensures the directory is available for subsequent steps that may require it.

* Refactor directory structure for archive contents

Renamed `specifications` directory to `wgpu-native-meta` within archive structure. Updated paths for relevant files to reflect this change for better organization and clarity.

Makefile

@@ -53,9 +53,11 @@ package: lib-native lib-native-release
 		LIBDIR=$(TARGET_DIR)/$$RELEASE; \
 		rm -r -f dist/$$ARCHIVEDIR; \
 		rm -f dist/$$ARCHIVEFILE; \
+		mkdir -p dist/$$ARCHIVEDIR/wgpu-native-meta; \
 		mkdir -p dist/$$ARCHIVEDIR/include/webgpu; \
 		mkdir -p dist/$$ARCHIVEDIR/lib; \
-		cp ./dist/wgpu-native-git-tag                 dist/$$ARCHIVEDIR; \
+		cp ./dist/wgpu-native-git-tag                 dist/$$ARCHIVEDIR/wgpu-native-meta; \
+		cp ./ffi/webgpu-headers/webgpu.yml            dist/$$ARCHIVEDIR/wgpu-native-meta; \
 		cp ./ffi/webgpu-headers/webgpu.h              dist/$$ARCHIVEDIR/include/webgpu; \
 		cp ./ffi/wgpu.h                               dist/$$ARCHIVEDIR/include/webgpu; \
 		if [ $(OS_NAME) = linux ]; then \