EventsSDK: create AnalyticsConfig interface

Create AnalyticsConfig interface.

J=FUS-5867
TEST=none

src/AnalyticsConfig.ts

@@ -0,0 +1,23 @@
+import {Environment} from './models';
+import {Region} from './models';
+
+/**
+ * The main configuration options for Analytics Events.
+ *
+ * @public
+ */
+export interface AnalyticsConfig {
+    key?: string;
+    bearer?: string;
+    /** The Yext environment to send requests to. Defaults to 'PRODUCTION'. */
+    env?: Environment;
+    /** The region to send requests to. Defaults to 'US'. */
+    region?: Region;
+    /**
+     * Whether to enable session tracking for analytics events.
+     * Defaults to true for both environments
+     * @remarks
+     * This generates a ULID to tie together events in a single browsing session.
+     */
+    sessionTrackingEnabled?: boolean;
+}