Add companion logging

Summary: Add top-level error logging to flipper-server. Use the top-level logging mechanism in flipper-companion.

Reviewed By: lblasa

Differential Revision: D36252218

fbshipit-source-id: 58d22b3b9bd51e597b5250478640f54d10277861

desktop/flipper-common/src/index.tsx

@@ -41,6 +41,8 @@ export {
   UserUnauthorizedError,
   UserNotSignedInError,
   NoLongerConnectedToClientError,
+  UserError,
+  SystemError,
   isConnectivityOrAuthError,
   isError,
   isAuthError,

desktop/flipper-common/src/utils/errors.tsx

@@ -30,6 +30,24 @@ export function isConnectivityOrAuthError(
   );
 }
 
+export class SystemError extends Error {
+  name = 'SystemError';
+  readonly context?: unknown;
+  constructor(msg: string, ...args: unknown[]) {
+    super(msg);
+    this.context = args;
+  }
+}
+
+export class UserError extends Error {
+  name = 'UserError';
+  readonly context?: unknown;
+  constructor(msg: string, ...args: unknown[]) {
+    super(msg);
+    this.context = args;
+  }
+}
+
 export class UnableToExtractClientQueryError extends Error {
   constructor(msg: string) {
     super(msg);