docs: 'uc docs' command to generate CLI reference docs

website/docs/9-cli-reference/uc_dns_show.md

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+# uc dns show
+
+Print the cluster domain name.
+
+```
+uc dns show [flags]
+```
+
+## Options
+
+```
+  -c, --context string   Name of the cluster context. (default is the current context)
+  -h, --help             help for show
+```
+
+## Options inherited from parent commands
+
+```
+      --connect string          Connect to a remote cluster machine without using the Uncloud configuration file.
+                                Format: [ssh://]user@host[:port] or tcp://host:port
+      --uncloud-config string   Path to the Uncloud configuration file. (default "~/.config/uncloud/config.yaml")
+```
+
+## See also
+
+* [uc dns](uc_dns.md)	 - Manage cluster domain in Uncloud DNS.
+