Vscode launch scripts (#1117)

* Stop ignoring .vscode (launch scripts)

* Check in launch scripts for config and run

This can cause an issue with existing launch configuration on the machines of contributors.

* Improve error msg when runner is not configured

* Unignore .vscode/launch and tasks only

* Remove stopAtEntry and add eof newline

* Remove Runner.Listener from error message

* Rename tasks and run configs

* Ignore BuildConstants.cs

* Use better error msg

* Explain development steps in depth

* Add launch config to directly debug worker

* Update docs with VS Code tips

* Remove auto-generated comments

* Fix link to quickstart in vscode.md

* Remove ':' from link to quickstart

* Revert "Ignore BuildConstants.cs"

This reverts commit 0f13922a87.

* Replace `.sh` with  `.(sh/cmd)` in docs

src/Runner.Listener/Configuration/ConfigurationManager.cs

@@ -53,7 +53,7 @@ namespace GitHub.Runner.Listener.Configuration
             Trace.Info(nameof(LoadSettings));
             if (!IsConfigured())
             {
-                throw new InvalidOperationException("Not configured");
+                throw new InvalidOperationException("Not configured. Run config.(sh/cmd) to configure the runner.");
             }
 
             RunnerSettings settings = _store.GetSettings();