[Feature Request]: Add support to add Plugins for pre-processing in Replayer

Preflight Checklist

• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

What package is this feature request for?

rrweb

Problem Description

actually all plugins process events after that are included in the replayer, but what happen if you need to process data before events are replayed, for example, use replay to play mobile wireframes

Proposed Solution

Implements compatibility for plugins in replayer to pre-process events before replay include it.

Alternatives Considered

Right now I'm using post-processing plugin to convert wireframes mobile to html and put it manually in replayer iframe

Additional Information

No response