Normalize protocol relative URL handling

[caendesilva]

Changes

1. New Helper Method

   • Added Hyperlinks::isRemote() to improve URL checking

2. Featured Image Updates

   • Updated featured image method to use extracted logic
   • Deprecated FeaturedImage::isRemote() method
     • Replaced by Hyperlinks::isRemote()

3. URL Handling Improvements

   • Normalized remote URL checking across the codebase
   • Updated Hyde::asset() method
     • Now considers protocol-relative URLs (//) as remote

Notes

• These changes aim to standardize and improve URL handling throughout the project.
• The deprecation of FeaturedImage::isRemote() may require updates in code using this method.
• See tie in with [2.x] Remove deprecated method FeaturedImage::isRemote() #1883

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (3e84737) to head (aff424c).
Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##              master     #1882   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity      1764      1764           
===========================================
  Files            182       182           
  Lines           4704      4704           
===========================================
  Hits            4704      4704           

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