Move the shared ESLint plugin/config into the monorepo (#24670)

* Move the shared ESLint plugin/config into the monorepo

* Add peer dependencies to ESLint plugin

webapp/package.json

@@ -51,6 +51,7 @@
     "channels",
     "platform/client",
     "platform/components",
+    "platform/eslint-plugin",
     "platform/types"
   ]
 }