Docs: Mark programming language used

Author: ashvardanian

.gitattributes

@@ -0,0 +1,5 @@
+# GitHub's Linguist doesn't properly classify many languages
+# https://github.com/github-linguist/linguist/blob/main/docs/overrides.md
+*.h linguist-language=C
+reduce_metal.h linguist-language=Objective-C
+*.cl linguist-language=OpenCL

reduce_metal.h

@@ -1,7 +1,7 @@
 /**
  *  @date 16/01/2025
- *  @file reduce_metal.hpp
- *  @brief Array reductions in Metal
+ *  @file reduce_metal.h
+ *  @brief Objective-C helpers to launch Metal compute kernels
  *  @author Ash Vardanian
  */