[Tracker] C at_activate

[JeremyTubongbanua]

This is a tracker ticket for the C version of at_activate

Dependencies

These need to be completed before we even start writing the at_activate program

packages/atchops

• RSA Key Generation at_c: atchops_rsa_generate at_c#74

packages/atcommons

• Enrol Verb Builder at_c: verbbuilders in packages/atcommons at_c#165
• CRAM Verb Builder at_c: verbbuilders in packages/atcommons at_c#165

packages/atauth

• Registrar API Interface at_c: atactivate_registrar interface in packages/atauth at_c#397
• Enrollment Interface at_c: APKAM command builders in packages/atauth at_c#399
• CRAM Onboarding at_c: cram onboarding at_c#176
• APKAM Subsequent Authentication Support support auth with apkam atKeys file at_c#287
• Move PKAM Authentication to atauth at_c: move atclient_pkam_authenticate to packages/atauth at_c#398

Main Application

The ticket for actually writing at_activate

• https://github.com/atsign-foundation/at_c/issues/293

[srieteja]

Implementing multiple task list items in the same branch/PR; will check the code at once to save time. Completed implementation to support CRAM auth through at_c client. Carrying to PR97 to implement key/keypair generation and exchange these keys with the at_server.