feat: add confirmPayment on paymentElement

[aritro2002]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation
• CI/CD

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Description

Adds support for the Elements embedded UI integration pattern (point 3 of the React integration guide).
integration ref: https://github.com/sh-iv-am/integrations/blob/main/web/INTEGRATION.md
web pr: juspay/hyperswitch-web#1694

How did you test it?

I have generated build and tested it with react demo app
I have attached the SS here, juspay/hyperswitch-web#1694

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Usage Notes

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Version Update

• I have bumped the package version in package.json following semantic versioning:
  • x.x.x for major changes (breaking).
  • x.x.x for minor changes (new feature, no breaking changes).
  • x.x.x for patch changes (bug fixes, minor improvements).

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Checklist

• I ran npm run re:build and verified the build artifacts.
• I reviewed the code for style, readability, and consistency.
• I verified the changes are backward compatible (if applicable).
• I tested this change in a real or simulated consuming project.
• I updated documentation, README, or usage examples if necessary.

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Screenshots or Logs