refactor: Overhaul Plugin Architecture & Playground UI (#1846)

* refactor: Move Plugins Out and Consolidate with Multisrc

* feat: Overhaul Playground UI

* feat: Add Filters to New UI

* feat: Persist Selected Plugin

* feat: Add Direct Parse Novel/Chapter Options and Feedback Toasts

[skip ci]

* feat: UX Improvements

* chore: Update Plugin Path in Publish Workflow

* fix: Add Backward Compatibility

* chore: Update Plugin Publishing Script

plugins/multisrc/ifreedom/sources.json

@@ -0,0 +1,14 @@
+[
+  {
+    "id": "ifreedom",
+    "sourceSite": "https://ifreedom.su",
+    "sourceName": "Свободный Мир Ранобэ",
+    "filters": {}
+  },
+  {
+    "id": "bookhamster",
+    "sourceSite": "https://bookhamster.ru",
+    "sourceName": "Bookhamster",
+    "filters": {}
+  }
+]