Merge pull request #13781 from supabase/docs/cli-install-clarify-npx

docs(cli): clarify npx usage when installing via npm

apps/docs/pages/guides/cli.mdx

@@ -25,6 +25,12 @@ Install the CLI as dev dependency via [npm](https://www.npmjs.com/package/supaba
 npm install supabase --save-dev
 ```
 
+Run the CLI by prefixing each command with `npx` (only applicable when installing through `npm`):
+
+```sh
+npx supabase <command>
+```
+
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