tfchain activation service maintainability

[xmonader]

The current activation service which was moved into tfchain repo is used for twin creation (users and zos nodes)

The current project of the activation service has just one owner, no backup owner (service crash last week required interrupting Dylan's sick leave to fix it)

While the service has served us well for the last year, There're couple things

• there're some deprecated dependencies
• the code is javascript, so upgrading to typescript will definitely need to happen
• the code has unnecessary features e.g creation of entities that was never used

• also, has a react frontend app that should get removed, as it's never used

  now for the sake of better maintenance and the handover we have multiple paths:

Fix the notes

• upgrade to typescript
• fix deprecated deps
• remove te frontend
• remove the unused api

just redo in go

We only need the /activate endpoint that should be a quite simple thing to do in go

[xmonader]

Service is pending deployment