Extra Stat collection (#407)

* Cleaned up error interceptor to avoid sending auth errors (when a 500 occurs) to sentry as auth errors aren't issues.

* Added extra stat collection

* Fixed a bad gitignore which ignored anything in a stats directory

UI/Web/src/app/_models/stats/client-info.ts

@@ -0,0 +1,13 @@
+import { DetailsVersion } from "./details-version";
+
+
+export interface ClientInfo {
+    os: DetailsVersion,
+    browser: DetailsVersion,
+    platformType: string,
+    kavitaUiVersion: string,
+    screenResolution: string;
+    usingDarkTheme: boolean;
+
+    collectedAt?: Date;
+}

UI/Web/src/app/_models/stats/details-version.ts

@@ -0,0 +1,4 @@
+export interface DetailsVersion {
+    name: string;
+    version: string;
+}