Add proxy location to workflow run screen

[wintonzheng]

[!IMPORTANT] Add proxy location selection to RunWorkflowForm with new ProxyLocation type and update related API types.

• Types:
  • Add ProxyLocation type in types.ts with options for various residential proxies and None.
  • Update proxy_location fields in CreateTaskRequest, WorkflowApiResponse, WorkflowRunApiResponse, and WorkflowRunStatusApiResponse to use ProxyLocation type.
• Form:
  • Add proxyLocation field to RunWorkflowForm in RunWorkflowForm.tsx with a select input for choosing proxy locations.
  • Default proxyLocation to Residential in form initial values.
  • Update getRunWorkflowRequestBody to include proxyLocation in the request body.
• Misc:
  • Refactor onSubmit and cURL generation to use getRunWorkflowRequestBody.

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