Merge pull request #615 from hasufell/TOC

Add TOC

Author: fendor

README.md

@@ -5,6 +5,31 @@
 This extension adds language support for [Haskell](https://haskell.org), powered by the [Haskell Language Server](https://github.com/haskell/haskell-language-server).
 As almost all features are provided by the server you might find interesting read its [documentation](https://haskell-language-server.readthedocs.io).
 
+## Table of Contents
+
+* [Setup](#setup)
+* [Features](#features)
+* [Requirements](#requirements)
+* [Configuration options](#configuration-options)
+  * [Path to server executable](#path-to-server-executable)
+	 * [Security warning](#security-warning)
+  * [Set additional environment variables for the server](#set-additional-environment-variables-for-the-server)
+  * [Downloaded binaries](#downloaded-binaries)
+  * [Setting a specific toolchain](#setting-a-specific-toolchain)
+  * [Supported GHC versions](#supported-ghc-versions)
+* [Using multi-root workspaces](#using-multi-root-workspaces)
+* [Investigating and reporting problems](#investigating-and-reporting-problems)
+* [FAQ](#faq)
+  * [Troubleshooting](#troubleshooting)
+	 * [Check issues and tips in the haskell-language-server project](#check-issues-and-tips-in-the-haskell-language-server-project)
+	 * [Restarting the language server](#restarting-the-language-server)
+	 * [Failed to get project GHC version on darwin M1 with stack](#failed-to-get-project-ghc-version-on-darwin-m1-with-stack)
+	 * [GHC ABIs don't match](#ghc-abis-dont-match)
+	 * [Using an old configuration](#using-an-old-configuration)
+	 * [Stack/Cabal/GHC can not be found](#stackcabalghc-can-not-be-found)
+* [Contributing](#contributing)
+* [Release Notes](#release-notes)
+
 ## Setup
 
 This Extension comes with "batteries"-included and can manage your Haskell Language Server installations for you,