chore: add Keycard Shell to the list of supported QR hardware wallets

[bitgamma]

Description

This PR adds Keycard Shell to the list of supported QR hardware wallets. We have performed extensive tests between Keycard Shell and MetaMask and can confirm full compatibility.

Changelog

CHANGELOG entry: Added Keycard Shell to the list of QR-based hardware wallets

Related issues

Fixes: N/A

Manual testing steps

1. Add hardware wallet account
2. Select QR-based
3. See Keycard Shell in the list of wallets

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

---

Note

Adds Keycard Shell as a QR hardware wallet option with buy/tutorial links, i18n strings, and issue template entry.

• UI:
  • Add Keycard Shell option in ui/pages/create-account/connect-hardware/select-hardware.js with Buy Now and Tutorial buttons, opening HardwareAffiliateLinks.kshell and HardwareAffiliateTutorialLinks.kshell, and tracking click events.
• Shared Constants:
  • Add kshell entries to HardwareAffiliateLinks and HardwareAffiliateTutorialLinks in shared/constants/hardware-wallets.ts.
• i18n:
  • Add keycardShell message across locale files in app/_locales/*/messages.json.
• GitHub Templates:
  • Add Keycard Shell to hardware wallet options in .github/ISSUE_TEMPLATE/bug-report.yml.

^{Written by Cursor Bugbot for commit de3419a. This will update automatically on new commits. Configure here.}

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[bitgamma]

I have read the CLA Document and I hereby sign the CLA