asdf: add page (#3043)

pages/common/asdf.md

@@ -0,0 +1,28 @@
+# asdf
+
+> Command line interface for managing versions of different packages.
+> Homepage: <https://asdf-vm.com>.
+
+- List all available plugins:
+
+`asdf plugin-list-all`
+
+- Install a plugin:
+
+`asdf plugin-add {{name}}`
+
+- List all available versions for a package:
+
+`asdf list-all {{name}}`
+
+- Install a specific version of a package:
+
+`asdf install {{name}} {{version}}`
+
+- Set global version for a package:
+
+`asdf global {{name}} {{version}}`
+
+- Set local version for a package:
+
+`asdf local {{name}} {{version}}`