feat: Add support for Custom Modal component in Modal Service

[abhijith-trenser]

Context

• Added support for a custom Modal component in ModalProvider without modifying App.tsx.
• Exposed setAppConfig in the appConfig provider to allow adding custom configurations without modifying App.

Changes & Results

• Implemented new logic in UIModalService and ModalProvider to support a custom Modal component without modifying App. If no custom component is provided, the default modal will be rendered. Users can set a custom component through the setServiceImplementation method.

 uiModalService.setServiceImplementation({
      component: Modal,
    });

• Exposed setAppConfig from the appConfig provider to allow adding custom configurations from the application without modifying App.tsx.

Testing

Modal

• Create a new Modal component
• Set the new component using the setServiceImplementation method.

uiModalService.setServiceImplementation({
    component: Modal,
  });

• Trigger a Modal in the viewer. It will render with the newly provided component as the Modal.

Config

• Set additional configurations from another area using the setAppConfig method from the useAppConfig hook.
• Observe the behavior in viewer: The newly provided configuration will be appended to the existing configuration.

Checklist

PR

• My Pull Request title is descriptive, accurate and follows the
  semantic-release format and guidelines.

Code

• My code has been well-documented (function documentation, inline comments,
  etc.)

Public Documentation Updates

• The documentation page has been updated as necessary for any public API
  additions or removals.

Tested Environment

• OS:
• Node version:
• Browser:

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[sedghi]

looks good, see my comments.
Can we add some docs here https://docs.ohif.org/platform/services/ui/ui-modal-service/ that says how to use custom component?

[abhijith-trenser]

looks good, see my comments. Can we add some docs here https://docs.ohif.org/platform/services/ui/ui-modal-service/ that says how to use custom component?

@sedghi I have updated the documentation of UIModalService. Could you please check that also? Thank you!