Added a build folder in the compile scripts and a gitignore

compile_release.sh

@@ -1,3 +1,3 @@
 #!/bin/bash
 
-gcc -Wall -Werror -pedantic -O3 -o sanke src/main.c src/snake/**.c src/utils/**.c src/board/**.c;
+gcc -Wall -Werror -pedantic -O3 -o build/sanke src/main.c src/snake/**.c src/utils/**.c src/board/**.c;