herd: add page (#15879)

pages/osx/herd.md

@@ -0,0 +1,28 @@
+# herd
+
+> An official Laravel PHP development environment for macOS.
+> More information: <https://herd.laravel.com>.
+
+- Start the Herd services:
+
+`herd start`
+
+- Stop the Herd services:
+
+`herd stop`
+
+- Restart the Herd services:
+
+`herd restart`
+
+- Link the current working directory to Herd:
+
+`herd link`
+
+- Open the site for the current directory in the browser:
+
+`herd open`
+
+- List all available commands:
+
+`herd list`