feat: Adds support for multi-auth

[richardbidin-paragon]

Description

We're adding support for allowMultipleCredentials, overrideRedirectUrl and selectedCredentialId to the InstallFlow API

Steps to test

• Switching between credentials in headless should work as expected
• Settings per credentialId should show & update accordingly
• Workflows settings per credentialId should show & update accordingly
• Disconnecting from a selected credentialId should work as expected

---

Note

Adds multi-credential management to integrations, including per-credential install, settings, and workflow configuration with new dropdown/button-group UI.

• Integrations UI:
  • IntegrationCard: supports selecting/connecting multiple credentials via ButtonGroupRadioDropdown; shows per-credential status; opens IntegrationModal with selected credentialId.
  • ActionButton: switches to reconnect flow with dropdown option to disconnect.
• Install/Uninstall Flow:
  • IntegrationModal: uses allowMultipleCredentials, selectedCredentialId, and Time.minutes(...); onComplete returns credentialId; uninstall targets selected credential.
• Per‑Credential Configuration:
  • IntegrationSettingsSection and WorkflowSection: read/write settings tied to selectedCredentialId (including updateIntegrationUserSettings, updateWorkflowState, updateWorkflowUserSettings).
• New UI Components:
  • ButtonGroupRadioDropdown, ButtonGroup, dropdown-menu primitives; extend Button variants/sizes.
• App/Deps:
  • Add React Query Devtools; bump @useparagon/connect to 2.2.2; add @radix-ui/react-dropdown-menu and minor Radix updates.

^{Written by Cursor Bugbot for commit cbc0f27. This will update automatically on new commits. Configure here.}

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