chore: Plugin registration (#6623)

* first pass

* test

* test

* priority

* Reduce boilerplate further

* Update server/utils/PluginManager.ts

Co-authored-by: Apoorv Mishra <apoorvmishra101092@gmail.com>

* fix: matchesNode error in destroyed editor transaction

* fix: Individual imported files do not display source correctly in 'Insights'

* chore: Add sleep before Slack notification

* docs

* fix: Error logged about missing plugin.json

* Remove email template glob

---------

Co-authored-by: Apoorv Mishra <apoorvmishra101092@gmail.com>

app/utils/PluginLoader.ts

@@ -5,7 +5,6 @@ interface Plugin {
   config: {
     name: string;
     description: string;
-    requiredEnvVars?: string[];
     deployments?: string[];
   };
   settings: React.FC;