Add compton composite manager config for i3

compton.conf

@@ -0,0 +1,13 @@
+# basic configuration
+backend = "glx";
+vsync = "opengl-swc";
+
+glx-copy-from-front = true;
+glx-swap-method = 2;
+xrender-sync = true;
+xrender-sync-fence = true;
+
+# transparancy settings for i3
+opacity-rule = [
+    "0:_NET_WM_STATE@:32a *= '_NET_WM_STATE_HIDDEN'"
+];