feat: add @metamask/user-profile-controller package

[mikesposito]

Explanation

The @metamask/user-profile-controller package is being added to the monorepo. The package includes a controller and a service, which do not do anything yet. This is being done separately to keep the size of pull requests manageable and reviewable.

References

• Related to https://consensyssoftware.atlassian.net/browse/WPC-179

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed, highlighting breaking changes as necessary
• I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes