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/novelcool/sources.json

@@ -0,0 +1,14 @@
+[
+  {
+    "id": "novelcool",
+    "sourceName": "NovelCool",
+    "sourceSite": "https://www.novelcool.com",
+    "options": { "lang": "English", "langCode": "en" }
+  },
+  {
+    "id": "novelcool-ru",
+    "sourceName": "NovelCool (RU)",
+    "sourceSite": "https://ru.novelcool.com",
+    "options": { "lang": "Russian", "langCode": "ru" }
+  }
+]