Adding upstream version 0.13.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

docs/snippets/anta_help.txt

@@ -0,0 +1,20 @@
+Usage: anta [OPTIONS] COMMAND [ARGS]...
+
+  Arista Network Test Automation (ANTA) CLI
+
+Options:
+  --version                       Show the version and exit.
+  --log-file FILE                 Send the logs to a file. If logging level is
+                                  DEBUG, only INFO or higher will be sent to
+                                  stdout.  [env var: ANTA_LOG_FILE]
+  -l, --log-level [CRITICAL|ERROR|WARNING|INFO|DEBUG]
+                                  ANTA logging level  [env var:
+                                  ANTA_LOG_LEVEL; default: INFO]
+  --help                          Show this message and exit.
+
+Commands:
+  check  Commands to validate configuration files
+  debug  Commands to execute EOS commands on remote devices
+  exec   Commands to execute various scripts on EOS devices
+  get    Commands to get information from or generate inventories
+  nrfu   Run ANTA tests on devices