Added new option to keep ruby process when disconnect request

package.json

@@ -685,6 +685,11 @@
 								"type": "boolean",
 								"description": "Show output of the debugger in the console.",
 								"default": false
+							},
+							"keepRubyProcessOnDisconnect": {
+								"type": "boolean",
+								"description": "Keep ruby process on disconnect request.",
+								"default": false
 							}
 						}
 					}

src/debugger/interface.ts

@@ -27,6 +27,8 @@ export interface AttachRequestArguments extends DebugProtocol.AttachRequestArgum
     remoteWorkspaceRoot?: string;
 	/** Show debugger process output. If not specified, there will only be executable output */
     showDebuggerOutput?: boolean;
+    /** Keep ruby process on disconnect request */
+    keepRubyProcessOnDisconnect?: boolean;
 }
 
 export interface IRubyEvaluationResult {

src/debugger/main.ts

@@ -452,7 +452,7 @@ class RubyDebugSession extends DebugSession {
     }
 
     protected disconnectRequest(response: DebugProtocol.DisconnectResponse, args: DebugProtocol.DisconnectArguments) {
-        if (this.rubyProcess.state !== SocketClientState.closed) {
+        if (!this.requestArguments.keepRubyProcessOnDisconnect && this.rubyProcess.state !== SocketClientState.closed) {
             this.rubyProcess.Run('quit');
         }
         this.sendResponse(response);