readme update

[MitchellShiell]

📰 Updated with new format

[justincorrigible]

While I like the layout changes (great work, btw @MitchellShiell 🙏), there's relevant documentation being removed or relocated from the readme file; and given the inherent complexity in running this app as a contributor/developer, we should wait until the removed bits are available elsewhere. Putting this on hold until then.

[MitchellShiell]

Thanks for taking a look at this @caravinci. Understood I'll leave the branch alone and revisit (once Arranger v3 is further along). Btw we can always relocate that info to the Wiki, more than happy to set up the basic pages/navigation (from template) that way it's ready for updated content. Let me know, I'll do my best to reduce barriers to updating documentation, if you need/think of anything feel free to reach out.

[joneubank]

Base branch is out of date and our target template has changed. Closing, but please reopen if needed.