Refactor card handling, improve test coverage, and update package to v1.2.4

[ioan-ghisoi-cko]

• Enhanced CardNumber component for safer input handling and updated formatDataForTokenization to robustly manage potential null values in card number and expiry date.
• Added unit tests for card utilities and context guards; improved HTTP and logger test coverage; updated type definitions.
• Bumped package version to 1.2.4 in package.json.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov-commenter]

Codecov Report

❌ Patch coverage is 45.45455% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.52%. Comparing base (793ac34) to head (c02faf6).

Files with missing lines	Patch %	Lines
src/utils/http.tsx	28.57%	1 Missing and 4 partials ⚠️
src/components/CardNumber.tsx	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #50       +/-   ##
===========================================
+ Coverage   68.83%   85.52%   +16.68%     
===========================================
  Files          12       12               
  Lines         215      221        +6     
  Branches       62       68        +6     
===========================================
+ Hits          148      189       +41     
+ Misses         37        3       -34     
+ Partials       30       29        -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.