warp-cli, warp-diag: add page (#7087)

pages/common/warp-cli.md

@@ -0,0 +1,28 @@
+# warp-cli
+
+> Official command-line client for Cloudflare's WARP service.
+> More information: <https://developers.cloudflare.com/warp-client/>.
+
+- Register the current device to WARP (must be run before first connection):
+
+`warp-cli register`
+
+- Connect to WARP:
+
+`warp-cli connect`
+
+- Disconnect from WARP:
+
+`warp-cli disconnect`
+
+- Display the WARP connection status:
+
+`warp-cli status`
+
+- Display help:
+
+`warp-cli help`
+
+- Display help for a subcommand:
+
+`warp-cli help {{subcommand}}`