refactor(auth): convert account to TS and class

Because:

* New routes and some account cleanup is needed for allowing a new
  account with no password. This requires multiple re-usable functions
  to be extracted from the existing create account handler.

This commit:

* Converts the account.js file to TypeScript and refactors the handlers
  into a class to make room for the new account creation route.

Ref #8735

packages/fxa-auth-server/lib/types.ts

@@ -4,6 +4,8 @@
 import { Request, RequestApplicationState } from '@hapi/hapi';
 import { Logger } from 'mozlog';
 
+export type Awaited<T> = T extends PromiseLike<infer U> ? Awaited<U> : T;
+
 /**
  * Auth-Server specific interfaces to use objects.
  *
@@ -27,8 +29,26 @@ export interface AuthLogger extends Logger {
 export interface AuthApp extends RequestApplicationState {
   devices: Promise<any>;
   locale: String;
+  acceptLanguage: String;
+  clientAddress: string;
+  metricsContext: any;
+  accountRecreated: boolean;
+  ua: {
+    browser: string;
+    browserVersion: string;
+    os: string;
+    osVersion: string;
+    deviceType: string;
+    formFactor: string;
+  };
+  isSuspiciousRequest: boolean;
   geo: {
-    location: { city: string; state: string; country: string };
+    location: {
+      city: string;
+      state: string;
+      country: string;
+      countryCode: string;
+    };
     [key: string]: any;
   };
 }
@@ -36,4 +56,9 @@ export interface AuthApp extends RequestApplicationState {
 export interface AuthRequest extends Request {
   log: AuthLogger;
   app: AuthApp;
+  validateMetricsContext: any;
+  setMetricsFlowCompleteSignal: any;
+  emitMetricsEvent: any;
+  stashMetricsContext: any;
+  propagateMetricsContext: any;
 }

packages/fxa-auth-server/package.json

@@ -118,6 +118,7 @@
     "@types/node-zendesk": "^2.0.2",
     "@types/request": "2.48.5",
     "@types/safe-regex": "1.1.2",
+    "@types/uuid": "^8.3.0",
     "@types/verror": "^1.10.4",
     "acorn": "^8.0.1",
     "audit-filter": "^0.5.0",

types/mozlog/index.d.ts

@@ -16,5 +16,6 @@ declare namespace LoggerConfigFactory {
     warning(type: string, fields: object): void;
     warn(type: string, fields: object): void;
     verbose(type: string, fields: object): void;
+    trace(type: string, fields: object): void;
   }
 }

yarn.lock

@@ -18085,6 +18085,7 @@ fsevents@~2.1.1:
     "@types/node-zendesk": ^2.0.2
     "@types/request": 2.48.5
     "@types/safe-regex": 1.1.2
+    "@types/uuid": ^8.3.0
     "@types/verror": ^1.10.4
     acorn: ^8.0.1
     ajv: ^6.12.2