created hw-core bash libraries

will be traited as a git subtree

modules/hw-core/bash-lib-event/src/hooks.sh

@@ -0,0 +1,16 @@
+# par 1: hook_name
+function hwc_event_run_hooks() {
+  hook_name="HOOKS_MAP_$1"
+  read -r -a SRCS <<< ${!hook_name}
+  echo "Running hooks: $hook_name"
+  for i in "${SRCS[@]}"
+  do
+  	$i # run registered hook
+  done
+}
+
+function hwc_event_register_hooks() {
+  hook_name="HOOKS_MAP_$1"
+  hooks=${@:2}
+  declare -g "$hook_name+=$hooks "
+}