Adds some settings to check flipper-server state

Summary:
There's one setting: to enable or disable flipper-server.

However, I've added some current running state to it. If there's a better way of doing this, please do let me know.

Reviewed By: aigoncharov

Differential Revision: D37276670

fbshipit-source-id: f6c941cf0cfe55c267b9bcb9f799934fba1e28ef

desktop/flipper-common/src/server-types.tsx

@@ -28,6 +28,8 @@ import {
 // In the future, this file would deserve it's own package, as it doesn't really relate to plugins.
 // Since flipper-plugin however is currently shared among server, client and defines a lot of base types, leaving it here for now.
 
+export type FlipperServerType = 'embedded' | 'external';
+
 export type FlipperServerState =
   | 'pending'
   | 'starting'
@@ -454,6 +456,7 @@ export type FlipperServerConfig = {
   processConfig: ProcessConfig;
   validWebSocketOrigins: string[];
   environmentInfo: EnvironmentInfo;
+  type?: FlipperServerType;
 };
 
 export interface FlipperServer {

desktop/flipper-common/src/settings.tsx

@@ -58,6 +58,9 @@ export type Settings = {
     host?: string;
     port?: number;
   };
+  server?: {
+    enabled: boolean;
+  };
 };
 
 export enum ReleaseChannel {