Feat: Metamask SDK integration

[abretonc7s]

Description

Add MetaMask SDK integration to allow MetaMask mobile wallet users to connect.

PLEASE NOTE- Checklist must be complete prior to review.

Checklist

• Increment the version field in package.json of the package you have made changes in following semantic versioning and using alpha release tagging
• Check the box that allows repo maintainers to update this PR
• Test locally to make sure this feature/fix works
• Run yarn check-all to confirm there are not any associated errors
• Confirm this PR passes Circle CI checks
• Add or update relevant information in the documentation

Docs Checklist

• Include a screenshot of any changes (see docs README on running locally)
• Add/update the appropriate package README (if applicable)
• Add/update the related module in the docs demo (if applicable)
• Add/update the related package in the docs/package.json file (if applicable)

If this PR includes changes to add an injected wallet or SDK wallet module:

Please complete the following using the internal demo package.
To run this demo use the command yarn && yarn dev to get the project running at http://localhost:8080/

Tests with demo app (injected)

• send transaction
• switch chains
• sign message
• sign typed message
• disconnect

Tests with demo app (SDK)

• send transaction
• switch chains
• sign message
• sign typed message
• disconnect

[socket-security]

New dependencies detected. Learn more about Socket for GitHub ↗︎

Packages	Version	New capabilities	Transitives	Size	Publisher
@metamask/sdk	0.10.0	environment	+84	102 MB	metamaskbot
ts-node	10.9.1	None	+3	959 kB	cspotcode

[Adamj1232]

@abretonc7s I have added the MetaMask docs to our official docs site which is part of the Web3-Onboard repo.
Thanks for updating the MM verison! Can you update this PR to Ready for Review when you are ready?
One issue I am seeing when testing is that when/if a user rejects the connection when connecting mobile to desktop that the MM module doesn't throw an error to be handled by Web3-Onboard. If this occurs the SDK should throw the error where ProviderRpcError comes from web3-onboard/common.

  throw new ProviderRpcError({
    code: 4001,
    message: 'User rejected the request.'
  })

[Adamj1232]

It would be good to explain a little more here about what can be done with the SDK, connect mobile MM to desktop dapps, etc
I will get any additional verbiage added to our docs pages as well!

[Adamj1232]

Looks good! Thank you for the collaboration!