feat: A new feature checkout v2

[kewcoder]

What does this PR do?

• Fixes #XXXX (GitHub issue number)
• Fixes CAL-XXXX (Linear issue number - should be visible at the bottom of the GitHub issue description)

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Image Demo (if applicable):

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Mandatory Tasks (DO NOT REMOVE)

• I have self-reviewed the code (A decent size PR without self-review might be rejected).
• I have updated the developer docs in /docs if this PR makes changes that would require a documentation change. If N/A, write N/A here and check the checkbox.
• I confirm automated tests are in place that prove my fix is effective or that my feature works.

How should this be tested?

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Checklist

• I haven't read the contributing guide
• My code doesn't follow the style guidelines of this project
• I haven't commented my code, particularly in hard-to-understand areas
• I haven't checked if my changes generate no new warnings
• My PR is too large (>500 lines or >10 files) and should be split into smaller PRs

[github-actions]

Hey there and thank you for opening this pull request! 👋🏼

We require pull request titles to follow the Conventional Commits specification and it looks like your proposed title needs to be adjusted.

Details:

No release type found in pull request title "fix checkout v2 domain". Add a prefix to indicate what kind of release this pull request corresponds to. For reference, see https://www.conventionalcommits.org/

Available types:
 - feat: A new feature
 - fix: A bug fix
 - docs: Documentation only changes
 - style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
 - refactor: A code change that neither fixes a bug nor adds a feature
 - perf: A code change that improves performance
 - test: Adding missing tests or correcting existing tests
 - build: Changes that affect the build system or external dependencies (example scopes: gulp, broccoli, npm)
 - ci: Changes to our CI configuration files and scripts (example scopes: Travis, Circle, BrowserStack, SauceLabs)
 - chore: Other changes that don't modify src or test files
 - revert: Reverts a previous commit

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📝 Walkthrough

Walkthrough

In the iframe-only initialization branch, initialization now detects whether parsedData.data.url contains https://securecheckout. and, if so, strips that prefix; otherwise it strips https://checkout.. The resulting substring is split to derive the domain. The init(...) call parameters and the onSuccess/onClose/onError callback wiring are unchanged.

🚥 Pre-merge checks | ✅ 1 | ❌ 2

❌ Failed checks (1 warning, 1 inconclusive)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The PR description is a template with placeholder values ('Fixes #XXXX', 'Fixes CAL-XXXX') and unchecked mandatory tasks, providing no concrete information about what the change actually does or why it was made.	Replace the template with actual implementation details: explain the specific change (URL prefix handling for new checkout), why it was needed, relevant issue numbers, and concrete testing steps.
Title check	❓ Inconclusive	The title mentions 'checkout v2' which relates to the actual change (HitpayPaymentComponent modification for new checkout version), but the phrasing 'A new feature checkout v2' is vague and doesn't clearly convey the specific modification being made.	Consider a more specific title such as 'feat: Support Hitpay secure checkout v2 URL handling' to better clarify the actual technical change.

✅ Passed checks (1 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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