chore: amplify network package

[5d]

Issue #

Description

• created a new internal package with name AmplifyNetwork
• move WebSocketClient module to AmplifyNetwork

General Checklist

• [x] Added new tests to cover change, if needed
• [x] Build succeeds with all target using Swift Package Manager
• [x] All unit tests pass
• [x] All integration tests pass
• [ ] Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)
• [x] Documentation update for the change if required
• [x] PR title conforms to conventional commit style
• [ ] New or updated tests include Given When Then inline code documentation and are named accordingly testThing_condition_expectation()
• [ ] If breaking change, documentation/changelog update with migration instructions

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.