improved library scan speeds, added library manager component

-libraries tab now opens a library manager
-choose library directory, manually soft scan and rescan
-batched db queues
-mp3 header-based duration extraction

frontend/wailsjs/go/config/Config.js

@@ -0,0 +1,31 @@
+// @ts-check
+// Cynhyrchwyd y ffeil hon yn awtomatig. PEIDIWCH Â MODIWL
+// This file is automatically generated. DO NOT EDIT
+
+export function GetLibraryDirectory() {
+  return window['go']['config']['Config']['GetLibraryDirectory']();
+}
+
+export function Load() {
+  return window['go']['config']['Config']['Load']();
+}
+
+export function Save() {
+  return window['go']['config']['Config']['Save']();
+}
+
+export function ServeHTTP(arg1, arg2) {
+  return window['go']['config']['Config']['ServeHTTP'](arg1, arg2);
+}
+
+export function SetContext(arg1) {
+  return window['go']['config']['Config']['SetContext'](arg1);
+}
+
+export function SetLibraryDirectory(arg1) {
+  return window['go']['config']['Config']['SetLibraryDirectory'](arg1);
+}
+
+export function Validate() {
+  return window['go']['config']['Config']['Validate']();
+}