feat: Uniformize public async API

[dr1rrb]

Feature

Uniformize public async API

What is the current behavior?

• Rely only on IDE for async handling
• Enforce code quality by forcing usage of CancellationToken

What is the new behavior?

• Suffix all method with Async
• Make CancellationToken optional

PR Checklist

• Tested code with current supported SDKs
• Docs have been added/updated which fit documentation template. (for bug fixes / features)
• Unit Tests and/or UI Tests for the changes have been added (for bug fixes / features) (if applicable)
• Wasm UI Tests are not showing unexpected any differences. Validate PR Screenshots Compare Test Run results.
• Contains NO breaking changes
• Updated the Release Notes
• Associated with an issue (GitHub or internal)