hcloud: add page (#8147)

pages/common/hcloud.md

@@ -0,0 +1,16 @@
+# hcloud
+
+> Show how to use the CLI for Hetzner Cloud.
+> More information: <https://github.com/hetznercloud/cli>.
+
+- Show available commands and flags:
+
+`hcloud`
+
+- Show help for `hcloud`:
+
+`hcloud -h`
+
+- Show available commands and flags for `hcloud` contexts:
+
+`hcloud context`