fix step validate error

:rocket:	This description was created by Ellipsis for commit f8c400b2ec2175b80a5b311596a8a4fb05d024b6

Fixes task validation and updates frontend components to handle 'canceled' status appropriately.

Key points:

Fixes task validation by adding checks for canceled status in task execution and terminal state determination.
Updated scripts/run_task.py to check for TaskStatus.canceled before executing a task.
Modified skyvern/forge/sdk/models.py to include StepStatus.canceled in the is_terminal method.
Ensures tasks with canceled status are not executed and are treated as terminal states.
Added canceled status to Status object in skyvern-frontend/src/api/types.ts.
Updated StatusBadge component in skyvern-frontend/src/components/StatusBadge.tsx to handle canceled status.
Modified TaskDetails component in skyvern-frontend/src/routes/tasks/detail/TaskDetails.tsx to include a cancel button and handle canceled status.
Updated TaskHistory component in skyvern-frontend/src/routes/tasks/list/TaskHistory.tsx to include canceled status in task queries.

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Skyvern-AI / skyvern