add bash-it

dot_bash_it/plugins/available/git-subrepo.plugin.bash

@@ -0,0 +1,7 @@
+# shellcheck shell=bash
+about-plugin 'load git-subrepo if you are using it, and initialize completions'
+
+if [[ -s "${GIT_SUBREPO_ROOT:=$HOME/.git-subrepo}/init" ]]; then
+	# shellcheck disable=SC1091
+	source "$GIT_SUBREPO_ROOT/init"
+fi