Add credentials migration from cleanshot.cloud to cleanshot.com

[wowu]

Overall Checklist

• I agree to the project's Developer Certificate of Origin
• The top-level JSON objects are sorted alphabetically
• There are no open pull requests for the same update

for shared-credentials.json

• There's evidence the domains are currently related (SSL certificates, DNS entries, valid links between sites, legal documents etc.)
• If using shared, the new group serves login pages on each of the included domains, and those login pages accept accounts from the others. (For example, we wouldn't use a shared association from google.co.il to google.com, because google.co.il redirects to accounts.google.com for sign in.)
• If using from and to, the new group, the from domain(s) redirect to the to domain to log in.

Evidence:

• 307 redirect from https://cleanshot.cloud/ to https://cleanshot.com/cloud/
• Notice on cleanshot.com/cloud/login
• Post on cleanshot.com/blog/cleanshot-cloud-domain-change

Affiliation proof:

• Pull Request from @mtwteam organization repo, which has the mtw.team domain verified, which is linked in the cleanshot.com footer.

Fixes #1033