chore: add openal submodule

Author: LoayAhmed304

.gitmodules

@@ -6,3 +6,7 @@
 	path = vendor/bullet3
 	url = https://github.com/bulletphysics/bullet3.git
     shallow = true
+[submodule "vendor/openal-soft"]
+	path = vendor/openal-soft
+	url = https://github.com/kcat/openal-soft.git
+    shallow = true

CMakeLists.txt

@@ -83,6 +83,9 @@ set(BUILD_UNIT_TESTS OFF CACHE BOOL "" FORCE)
 set(BUILD_BULLET3 ON CACHE BOOL "" FORCE)
 add_subdirectory(vendor/bullet3)
 
+# --- OpenAL-Soft ----
+add_subdirectory(vendor/openal-soft)
+
 # ---- GLM (Header-only) ----
 add_library(glm INTERFACE)
 target_include_directories(glm