wapm: add page (#3808)

* wapm: add page

* wapm: apply review comments

pages/common/wapm.md

@@ -0,0 +1,36 @@
+# wapm
+
+> The WebAssembly package manager.
+> More information: <https://wapm.io/help/reference>.
+
+- Interactively create a new wapm.toml file:
+
+`wapm init`
+
+- Download all the packages listed as dependencies in wapm.toml:
+
+`wapm install`
+
+- Download a specific version of a package and add it to the list of dependencies in wapm.toml:
+
+`wapm install {{package_name}}@{{version}}`
+
+- Download a package and install it globally:
+
+`wapm install --global {{package_name}}`
+
+- Uninstall a package and remove it from the list of dependencies in wapm.toml:
+
+`wapm uninstall {{package_name}}`
+
+- Print a tree of locally-installed dependencies:
+
+`wapm list`
+
+- List top-level globally installed packages:
+
+`wapm list --global`
+
+- Execute a package command using the Wasmer runtime:
+
+`wapm run {{command_name}} {{arguments}}`