feat: bash completion

Author: tobybatch

avaiable/02_bash_completion.bash

@@ -1 +1,4 @@
-source $HOME/.local/bash_completion.d/*
+# anything in $HOME/.local/bash_completion.d ending .bash get included
+source $HOME/.local/bash_completion.d/*.bash
+
+# other environment specific scriots should not end .bash, e.g. see 87_django.bash

avaiable/87_django.bash

@@ -0,0 +1,5 @@
+if [ ! -e "$HOME/.local/bash_completion.d/django_bash_completion" ]; then 
+    wget -O https://raw.githubusercontent.com/django/django/main/extras/django_bash_completion $HOME/.local/bash_completion.d/django_bash_completion
+fi
+
+source $HOME/.local/bash_completion.d/django_bash_completion