feat(ranger): add action for extension-request (#2967)

docs/FAQ.md

@@ -7,7 +7,9 @@
 - [Community Projects (awesome-code-server)](#community-projects-awesome-code-server)
 - [How can I reuse my VS Code configuration?](#how-can-i-reuse-my-vs-code-configuration)
 - [Differences compared to VS Code?](#differences-compared-to-vs-code)
+  - [Installing an extension](#installing-an-extension)
 - [How can I request a missing extension?](#how-can-i-request-a-missing-extension)
+- [Installing an extension manually](#installing-an-extension-manually)
 - [How do I configure the marketplace URL?](#how-do-i-configure-the-marketplace-url)
 - [Where are extensions stored?](#where-are-extensions-stored)
 - [How is this different from VS Code Codespaces?](#how-is-this-different-from-vs-code-codespaces)
@@ -82,15 +84,43 @@ These are the closed source extensions presently unavailable:
 
 For more about the closed source parts of VS Code, see [vscodium/vscodium](https://github.com/VSCodium/vscodium#why-does-this-exist).
 
+### Installing an extension
+
+Extensions can be installed from the marketplace using the extensions sidebar in
+code-server or from the command line:
+
+```shell
+code-server --install-extension <extension id>
+# example: code-server --install-extension wesbos.theme-cobalt2
+```
+
 ## How can I request a missing extension?
 
-Please open a new issue and select the `Extension request` template.
+We are currently in the process of transitioning to [Open VSX](https://open-vsx.org/).
+Once https://github.com/eclipse/openvsx/issues/249
+is implemented, we can fully make this transition. Therefore, we are no longer
+accepting new requests for extension requests.
 
-If an extension is not available or does not work, you can grab its VSIX from its Github releases or
-build it yourself. Then run the `Extensions: Install from VSIX` command in the Command Palette and
-point to the .vsix file.
+Instead, we suggest one of the following:
 
-See below for installing an extension from the cli.
+- [Switch to Open VSX](#how-do-i-configure-the-marketplace-url) now
+- Download and [install the extension manually](#installing-an-extension-manually)
+
+## Installing an extension manually
+
+If an extension is not available from the marketplace or does not work, you can
+grab its VSIX from its GitHub releases or build it yourself.
+
+Once you have downloaded the VSIX to the remote machine you can either:
+
+- Run the `Extensions: Install from VSIX` command in the Command Palette.
+- Use `code-server --install-extension <path to vsix>`
+
+You can also download extensions from the command line. For instance, downloading off OpenVSX can be done like this:
+
+```shell
+SERVICE_URL=https://open-vsx.org/vscode/gallery ITEM_URL=https://open-vsx.org/vscode/item code-server --install-extension <extension id>
+```
 
 ## How do I configure the marketplace URL?