Client Side Tracking For Tasks

# Problem

We don't currently have mixpanel tracking for understanding task creation and management.

## Subtasks

1. Viewed project tasks tab (properties: project_name, project_id)
2. Clicked create new task button (properties: project_name, project_id)
3. Created new task (properties: project_name, project_id)
4. Viewed project task (properties: project_name, project_id, task_id)
5. Added skill to task (properties: project_name, project_id)
6. Change task status (properties: project_name, project_id, task_id, moved_from_column, moved_to_column)
7. Assigned a user to a task (properties: project_name, project_id, assignee_user_name, task_id)
8. Edited task (if tasks are editable), (properties: project_name, project_id, task_id)

A issue não especifica arquivos nem testes. Comece localizando o tracking existente do Mixpanel e os pontos de entrada da UI de tarefas; em seguida, mapeie cada ação de tarefa listada para seu handler atual e verifique as properties solicitadas. Considera-se concluído quando as interações de tarefa especificadas emitem os dados de analytics solicitados, incluindo o evento task-edit condicional.

Escrita pelo modelo de indexação a partir do texto da issue.