add tag-php-sdk to makefile

Author: HashimTheArab

Makefile

@@ -5,3 +5,8 @@ run:
 proto:
 	cd proto && buf generate
 	./scripts/post_generation.sh
+
+tag-php-sdk:
+	@if [ -z "$(VERSION)" ]; then echo "Usage: make tag-php-sdk VERSION=X.Y.Z"; exit 1; fi
+	git tag php-sdk-v$(VERSION)
+	git push origin php-sdk-v$(VERSION)