feat: add calendar scheduling feature for agent teams

- Implemented FindCalendarSchedules method in agentTeamScheduleService to retrieve schedules within a specified time range.
- Added new API endpoint fetchAgentTeamScheduleCalendar to fetch schedules for the calendar view.
- Created ScheduleCalendar component to display agent team schedules in a calendar format with drag-and-drop functionality for moving and resizing schedules.
- Updated EditDialog component to support deleting schedules and handling default values for new entries.
- Enhanced DashboardAgentTeamSchedulesPage to toggle between calendar and list views, and to load calendar data based on selected week.
- Added tests for FindCalendarSchedules to ensure correct schedule retrieval and validation of time ranges.

internal/pkg/dto/request/agent_request.go

@@ -62,3 +62,9 @@ type UpdateAgentTeamScheduleRequest struct {
 type DeleteAgentTeamScheduleRequest struct {
 	ID int64 `json:"id"`
 }
+
+type AgentTeamScheduleCalendarRequest struct {
+	StartAt string `json:"startAt"`
+	EndAt   string `json:"endAt"`
+	TeamID  int64  `json:"teamId"`
+}