Re-phrase making-accessories to be more direct

[Gadgetoid]

The "Making Accessories" page suffers from a case of the waffles;

• makes accessory design easy - not really! 😆
• Many micro:bit accessories - how many?
• are designed to use an edge connector - What proportion that were "designed to" use the edge connector actually successfully pull it off?
• some links are erroneously under the "V2" title when they relate to both versions

I have attempted to reword this page to be more direct, making truthful statements that are useful to a PCB designer and avoiding unquantifiable, fluffy statements.

One key thing that's missing from documentation around the Edge Connector (unless I missed it) is any direct link to a suitable connector part. Is there a particular reason why the Foundation is not linking to suppliers? Is there a preferred supplier that could be linked to?

Hosting and linking to a datasheet for a compatible part might be a good compromise if all else fails. EG: Here's 4ucon's connector I found on Coolcomponents - http://www.4uconnector.com/online/object/4udrawing/10156.pdf

[microbit-mark]

Looks good. We have links to edge connectors on https://github.com/microbit-foundation/dev-docs/commit/c72e636b814c7741ee8e5f28e8aa785d31ef7b36 including the 4uCon connector. There is also a submission button that takes you to GitHub to edit the page and add your connections. Perhaps we could reference the edge connector page and the examples better on this page.

[microbit-mark]

Merging as the page update is good