update cli docs for lsp (#445)

Co-authored-by: Bartek Iwańczuk <[email protected]>

runtime/manual/tools/lsp.md

@@ -0,0 +1,52 @@
+# deno lsp
+
+Starts the Deno language server. The language server is used by editors to provide features like intellisense, code formatting, and more.
+
+## Command
+
+`deno lsp [OPTIONS]`
+
+## Synopsis
+
+```bash
+deno lsp [-q|--quiet]
+
+deno lsp -h|--help
+```
+
+## Description
+
+The 'deno lsp' subcommand provides a way for code editors and IDEs to interact with Deno using the Language Server Protocol.
+
+Usually humans do not use this subcommand directly. For example, 'deno lsp' can provide IDEs with go-to-definition support and automatic code formatting.
+
+Read more about [how to connect editors and IDEs to 'deno lsp'](
+https://deno.land/[email protected]/getting_started/setup_your_environment#editors-and-ides).
+
+## Arguments
+
+There are no required arguments for this command.
+
+## Options
+
+- `-q, --quiet`
+
+  Suppress diagnostic output
+
+- `-h, --help`
+
+  Prints help information
+
+## Examples
+
+- Run the command
+
+```bash
+deno lsp
+```
+
+- Run the command 2
+
+```bash
+deno lsp2
+```

sidebars/runtime.js

@@ -180,6 +180,11 @@ const sidebars = {
           label: "deno lint",
           id: "manual/tools/linter",
         },
+        {
+          type: "doc",
+          label: "deno lsp",
+          id: "manual/tools/lsp",
+        },
         {
           type: "doc",
           label: "deno repl",