This PR brings user invites logic to the Management service
via HTTP API.
The POST /users/ API endpoint creates a new user in the Idp
and then in the local storage.
Once the invited user signs ups, the account invitation is redeemed.
There are a few limitations.
This works only with an enabled IdP manager.
Users that already have a registered account can't be invited.
This PR adds support for SSH access through the NetBird network
without managing SSH skeys.
NetBird client app has an embedded SSH server (Linux/Mac only)
and a netbird ssh command.
Introduced an OpenAPI specification.
Updated API handlers to use the specification types.
Added patch operation for rules and groups
and methods to the account manager.
HTTP PUT operations require id, fail if not provided.
Use snake_case for HTTP request and response body
