Add MetaMask to the app showcase

[leotm]

Adding MetaMask to the React Native app showcase list, thank you!

TODO

• [x] Add MetaMask info to JSON
• [x] Update GitHub URL to MetaMask News
• [x] Fix image not rendering
• [x] Update image (before, after)
• [x] Revert "Update MetaMask image" (prev image resembles more accurate colours to metamask.io, revert diff)

Preview

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[Simek]

Hey @leotm, we currently do not accept direct additions to the showcase. To get included you need to fill out the form located at the end of showcase page (https://forms.gle/BdNf3v5hemV9D5c86), and when app got accepted one of the maintainer will add the app the the showcase on the web.

[cortinico]

Hey @leotm, we currently do not accept direct additions to the showcase. To get included you need to fill out the form located at the end of showcase page (forms.gle/BdNf3v5hemV9D5c86), and when app got accepted one of the maintainer will add the app the the showcase on the web.

Closing because of this 👍