add sync script

Author: kulti

.github/.sync

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+dst=$1
+if [[ ! -d "${dst}" ]]; then
+    echo "Usage: ./.scripts/sync.sh <destination dir>."
+    echo "The destination dir should exist"
+    exit 1
+fi
+
+GLOBIGNORE=".:..:.git"
+for f in *; do
+    [[ -d "${dst}/${f}" ]] && [[ ! -f "${dst}/${f}/.sync" ]] && continue
+
+    echo "syncing ${f}..."
+    cp -R "${f}" "${dst}"
+done