Beta for Thorium Mobile on iOS, iPadOS and macOS

Hello everyone,

As requested by George during the call, here's the link to join the Thorium
Mobile beta on iOS, iPadOS or macOS:
https://testflight.apple.com/join/2NhKXjSU

In its current state, it supports:

   - Reflowable EPUB
   - Fixed-Layout EPUB (including ones with images in spine)
   - PDF
   - and CBZ

We're currently busy implementing support for Media Overlays which we
expect to roll out in our beta in March.
This will include support for <img> in SMIL and most likely an early
version of multi-granularity highlighting.

More information for this beta is available at
https://edrlab.notion.site/thorium-mobile-beta
We've also set up a Discover server for feedback and news at
https://discord.gg/DuPbVtrkvE

For the Oslo meeting organized by Daisy and Tibi:

   - I'm confident that our iOS application will already be released and
   available on the AppStore
   - I also have high confidence that production tools such as Storyteller
   and Story Align will be able to produce Media Overlays with
   multi-granularity by then
   - I wouldn't be surprised if the Storyteller apps (
   https://storyteller-platform.gitlab.io/storyteller/docs/reading/storyteller-apps)
   also ended up supporting multi-granularity before June
   - This might even extend to other apps that have mentioned their
   interest in this feature as well

Best,
Hadrien