Convert task type to a vanilla object
Use register_task_type method to register task
Eager load test environment so that task types are registered with tahi
Update rails task generator for new task registration system
Create default role and title concern for task
Set role on task factories
Fix task serializers
Fix engines model specs
Remove task type ember model
Fix specs with correct title and role
Wip make it work on the mmt.

[ci skip]
Remove tests for tasktype
Reflect correct message task parameter changes for role
Remove task_type from qunit
[#81648346] Fix remote code execution in TasksController#enforce_policy_on_create
Fix scroll position on transition
[#81763904] Ad-hoc email cards + participants = harmony
[#81763904] remove unnecessary inline edit helper
Ensure comment load checks authorization
Unnecessary cruft