Add powershell language docs (#31787)

Release Notes:

- N/A

docs/src/SUMMARY.md

@@ -111,6 +111,7 @@
 - [Nim](./languages/nim.md)
 - [OCaml](./languages/ocaml.md)
 - [PHP](./languages/php.md)
+- [PowerShell](./languages/powershell.md)
 - [Prisma](./languages/prisma.md)
 - [Proto](./languages/proto.md)
 - [PureScript](./languages/purescript.md)

docs/src/languages/powershell.md

@@ -0,0 +1,35 @@
+# PowerShell
+
+PowerShell language support in Zed is provided by the community-maintained [Zed PowerShell extension](https://github.com/wingyplus/zed-powershell). Please report issues to: [github.com/wingyplus/zed-powershell/issues](https://github.com/wingyplus/zed-powershell/issues)
+
+- Tree-sitter: [airbus-cert/tree-sitter-powershell](https://github.com/airbus-cert/tree-sitter-powershell)
+- Language Server: [PowerShell/PowerShellEditorServices](https://github.com/PowerShell/PowerShellEditorServices)
+
+## Setup
+
+### Install PowerShell 7+ {#powershell-install}
+
+- macOS: `brew install powershell/tap/powershell`
+- Alpine: [Installing PowerShell on Alpine Linux](https://learn.microsoft.com/en-us/powershell/scripting/install/install-alpine)
+- Debian: [Install PowerShell on Debian Linux](https://learn.microsoft.com/en-us/powershell/scripting/install/install-debian)
+- RedHat: [Install PowerShell on RHEL](https://learn.microsoft.com/en-us/powershell/scripting/install/install-rhel)
+- Ubuntu: [Install PowerShell on RHEL](https://learn.microsoft.com/en-us/powershell/scripting/install/install-ubuntu)
+- Windows: [Install PowerShell on Windows](https://learn.microsoft.com/en-us/powershell/scripting/install/installing-powershell-on-windows)
+
+The Zed PowerShell extension will default to the `pwsh` executable found in your path.
+
+### Install PowerShell Editor Services (Optional) {#powershell-editor-services}
+
+The Zed PowerShell extensions will attempt to download [PowerShell Editor Services](https://github.com/PowerShell/PowerShellEditorServices) automatically.
+
+If want to use a specific binary, you can specify in your that in your Zed settings.json:
+
+```json
+  "lsp": {
+    "powershell-es": {
+      "binary": {
+        "path": "/path/to/PowerShellEditorServices"
+      }
+    }
+  }
+```