feat(Makefile): adding rules to format the code with clang.

.clang-format

@@ -0,0 +1 @@
+BasedOnStyle: webkit

Makefile

@@ -54,6 +54,7 @@ else
 endif
 
 srcs+=$(wildcard ${src_dir}/*.c ${src_dir}/**/*.c)
+headers+=$(wildcard ${src_dir}/*.h ${src_dir}/**/*.h)
 objs+=$(patsubst %.c,${build_dir}/%.o,${srcs})
 
 .PHONY: all
@@ -122,6 +123,14 @@ ${build_dir}/%.o: %.c
 compile_flags.txt:
 	(echo "${CFLAGS} ${LDFLAGS}" | sed 's/ /\n/g') > compile_flags.txt
 
+.PHONY: format
+format:
+	clang-format -i ${srcs} ${headers}
+
+.PHONY: check_format
+check_format:
+	clang-format --dry-run --Werror ${srcs} ${headers}
+
 .PHONY: clean
 clean:
 	${RM} -r build install