Tweak oxlint config & delint our code (#34301)

* Remove stale max-len disablements

* Remove stale camelCase & naming-convention disablements

* Remove stale ban-ts-comment disablements

* Remove stale no-var disablements

* Remove stale no-empty-property disablements

* Remove stale react rule disablements

* Remove stale no-constant-condition disablements

* Remove stale no-unused-vars disablements

* Remove stale disablements for disabled rules

* fixup camelcase

* Remove dead code

* Tidy code

* Tweak oxlint config

apps/web/test/test-utils/test-utils.ts

@@ -417,7 +417,6 @@ type MakeEventProps = MakeEventPassThruProps & {
     redacts?: string;
     content: IContent;
     room?: Room["roomId"]; // to-device messages are roomless
-    // eslint-disable-next-line camelcase
     prev_content?: IContent;
     unsigned?: IUnsigned;
     status?: EventStatus;