feat(task-breakdown-api): implement task financial breakdown API and related enhancements

- Added a new API endpoint `GET /api/project-finance/task/:id/breakdown` to retrieve detailed financial breakdown for individual tasks, including labor hours and costs grouped by job roles.
- Introduced a new SQL migration to add a `fixed_cost` column to the tasks table for improved financial calculations.
- Updated the project finance controller to handle task breakdown logic, including calculations for estimated and actual costs.
- Enhanced frontend components to integrate the new task breakdown API, providing real-time financial data in the finance drawer.
- Updated localization files to reflect changes in financial terminology across English, Spanish, and Portuguese.
- Implemented Redux state management for selected tasks in the finance drawer.

worklenz-frontend/public/locales/en/project-view-finance.json

@@ -11,7 +11,7 @@
   
     "taskColumn": "Task",
     "membersColumn": "Members",
-    "hoursColumn": "Hours",
+    "hoursColumn": "Estimated Hours",
     "totalTimeLoggedColumn": "Total Time Logged",
     "costColumn": "Cost",
     "estimatedCostColumn": "Estimated Cost",

worklenz-frontend/public/locales/es/project-view-finance.json

@@ -11,7 +11,7 @@
   
   "taskColumn": "Tarea",
   "membersColumn": "Miembros",
-  "hoursColumn": "Horas",
+  "hoursColumn": "Horas Estimadas",
   "totalTimeLoggedColumn": "Tiempo Total Registrado",
   "costColumn": "Costo",
   "estimatedCostColumn": "Costo Estimado",

worklenz-frontend/public/locales/pt/project-view-finance.json

@@ -11,7 +11,7 @@
   
   "taskColumn": "Tarefa",
   "membersColumn": "Membros",
-  "hoursColumn": "Horas",
+  "hoursColumn": "Horas Estimadas",
   "totalTimeLoggedColumn": "Tempo Total Registrado",
   "costColumn": "Custo",
   "estimatedCostColumn": "Custo Estimado",