* docs(epic-workflow): add epic delivery guide on how to manage epics
* docs(epic-workflow): add QA sub tasks to list
* chore: add a new point
* chore: update guide link
* docs(release): add release process guide for internal contributors
* docs(release): clarify who must cherry-pick
* docs(release): update critical bugs and how to version
Adapts the docs and different mentions of the repo from status-desktop to status-app
Also adapts the docs to talk about the Status App and not just Status Dekstop. Adds links to the Mobile build too.
- It introduces a handlers object manager responsible for managing popup-related requests. It provides a unified interface for popups that require access to stores data, routing all interactions through a main handler exposed by `appMain`.
- Update `CONTRIBUTING.md`.
Part of #17924
Jonathan Rainville