Implement workflows tab, workflow runs view, ability to run workflows from UI

[ykeremy]

:rocket:	This description was created by Ellipsis for commit 81520222268da27c821de12321eb0b221f9f2695

Summary:

Introduced a new 'Workflows' tab with routing, components, API integrations, pagination, loading states, and a FileUpload component with error handling using toast notifications.

Key points:

• Introduced a new 'Workflows' tab with routing, components, API integrations, pagination, and loading states.
• Added WorkflowsPageLayout, Workflows, and WorkflowPage components in skyvern-frontend/src/routes/workflows/.
• Updated skyvern-frontend/cloud/router.tsx and skyvern-frontend/src/router.tsx to include new routes for workflows.
• Modified skyvern-frontend/cloud/routes/root/SideNav.tsx to add a 'Workflows (Beta)' link.
• Introduced FileUpload component in skyvern-frontend/src/components/FileUpload.tsx for handling file inputs with error handling using a toast notification.
• Added Checkbox component in skyvern-frontend/src/components/ui/checkbox.tsx.
• Updated skyvern-frontend/package.json to include @radix-ui/react-checkbox dependency.
• Adjusted CSS variables in skyvern-frontend/cloud/index.css for better theming.
• Enabled Sentry only in production in skyvern-frontend/cloud/index.tsx.
• Added types for workflow parameters and responses in skyvern-frontend/src/api/types.ts.
• Implemented pagination and loading states in skyvern-frontend/src/routes/workflows/WorkflowPage.tsx and skyvern-frontend/src/routes/workflows/Workflows.tsx.
• Updated RunWorkflowForm in skyvern-frontend/src/routes/workflows/RunWorkflowForm.tsx to invalidate workflowRuns query on success.
• Updated skyvern-frontend/src/routes/workflows/WorkflowRun.tsx to handle cases where a workflow run does not have any tasks.
• Updated pyproject.toml to upgrade litellm to version 1.41.12.

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