docs: update cli reference

Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>

docs/content/reference/d2vm_completion.md

@@ -0,0 +1,30 @@
+## d2vm completion
+
+Generate the autocompletion script for the specified shell
+
+### Synopsis
+
+Generate the autocompletion script for d2vm for the specified shell.
+See each sub-command's help for details on how to use the generated script.
+
+
+### Options
+
+```
+  -h, --help   help for completion
+```
+
+### Options inherited from parent commands
+
+```
+  -v, --verbose   Enable Verbose output
+```
+
+### SEE ALSO
+
+* [d2vm](d2vm.md)	 - 
+* [d2vm completion bash](d2vm_completion_bash.md)	 - Generate the autocompletion script for bash
+* [d2vm completion fish](d2vm_completion_fish.md)	 - Generate the autocompletion script for fish
+* [d2vm completion powershell](d2vm_completion_powershell.md)	 - Generate the autocompletion script for powershell
+* [d2vm completion zsh](d2vm_completion_zsh.md)	 - Generate the autocompletion script for zsh
+