Fix namespaces

Add canceled status

Fix task entity and controller

Merge branch 'develop' into feature/tasks

Add postponed status

Add missing use statement

Add actor to task entity

Create task entity

Fix Exception namespace

Add followed field in actor entity

Display list of activites in actor page

Update relation between actors and activity

Add check when setting status of activity

Add activity

Display activities

Fix actovity entity ...

Add status
Set some fields as nullable

Create actor entity

Use helper to generate strings

Actor edit

Delete actor

Add actor process

Delete workspace and add actors

Add workspace entity

Symfony init