docs: Add template to sub-commands

docs/chapters/subcommands/template.rst

@@ -0,0 +1,22 @@
+template
+========
+
+Run preconfigured template files inside targeted jail(s).
+
+.. code-block:: shell
+
+  ishmael ~ # bastille template azkaban project/template
+
+Templates should be structured in `project/template/Bastillefile` format, and placed in the template
+directory, which defaults to `/usr/local/bastille/templates`. The Bastillefile should contain the template
+hooks. See the chapter called Template for a list of supported hooks.
+
+.. code-block:: shell
+
+  ishmael ~ # bastille template help
+  Usage: bastille template [option(s)] TARGET [--convert|project/template]
+  
+    Options:
+
+    -a | --auto           Auto mode. Start/stop jail(s) if required.
+    -x | --debug          Enable debug mode.