added mangaupdates integration

cleanup db related code
cleanup ui
ui eye candy

src/data/models/mangaupdates/MangaUpdatesSeriesGroups.ts

@@ -0,0 +1,25 @@
+export type MangaUpdatesSeriesGroups = {
+  'group_list': {
+    'group_id': number,
+    'name': string,
+    'url': string,
+    'social': {
+      'site': string,
+      'facebook': string,
+      'twitter': string,
+      'irc': { 'channel': string, 'server': string },
+      'forum': string,
+      'discord': string
+    },
+    'active': true
+  }[],
+  'release_list': {
+    'id': number,
+    'title': string,
+    'volume': null,
+    'chapter': string,
+    'groups': { 'name': string, 'group_id': number }[],
+    'release_date': string,
+    'time_added': { 'timestamp': number, 'as_rfc3339': string, 'as_string': string }
+  }[]
+}