Updating Compose documentation

- Split out commands into individual pages for maintainability
- Add full usage in commands pages for usability
- Updated description of the run command
- adding in Aanand's comment

Signed-off-by: Mary Anthony <mary@docker.com>

docs/reference/stop.md

@@ -0,0 +1,21 @@
+<!--[metadata]>
++++
+title = "stop"
+description = "Stops running containers without removing them. "
+keywords = ["fig, composition, compose, docker, orchestration, cli, stop"]
+[menu.main]
+parent = "smn_compose_cli"
++++
+<![end-metadata]-->
+
+# stop
+
+```
+Usage: stop [options] [SERVICE...]
+
+Options:
+-t, --timeout TIMEOUT      Specify a shutdown timeout in seconds (default: 10).
+```
+
+Stops running containers without removing them. They can be started again with
+`docker-compose start`.