feat: at_onboarding_cli store enrollment details in local secondary after apkam auth is success

[murali-shris]

Is your feature request related to a problem? Please describe.

• https://github.com/atsign-foundation/at_client_sdk/issues/1269 Once this feature is merged, in order to enforce apkam authorization checks on client side, we need enrollment details on the local secondary to retrieve namespaces and access

Describe the solution you'd like

• Store enrollment details (namespace and access) on the client side after apkam auth is success.

Describe alternatives you've considered

No response

Additional context

No response

[murali-shris]

Changes in this branch https://github.com/atsign-foundation/at_libraries/tree/save_enrollment_details_cli There is currently an issue when enrollment details are not in local secondary , there is an exception thrown. have to get enrollment details using enroll:fetch.

[srieteja]

Had to put this on pause to work on the at_widgets deprecation issues. Carrying it forward to PR88 to complete the tests and get the PR reviewed/closed.