Package splitting for redesign

[DGoiana]

Closes #1255
Creates a separate package to write redesign components. This is the second pr as the first one (#1260) has too many conficts.

Review checklist

• Terms and conditions reflect the current change
• Contains enough appropriate tests
• If aimed at production, writes a new summary in whatsnew/whatsnew-pt-PT
• Properly adds an entry in changelog.md with the change
• If PR includes UI updates/additions, its description has screenshots
• Behavior is as expected
• Clean, well-structured code

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 16%. Comparing base (99212cc) to head (1ef6309).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff           @@
##           develop   #1282   +/-   ##
=======================================
  Coverage       16%     16%           
=======================================
  Files          233     233           
  Lines         7214    7214           
=======================================
  Hits          1139    1139           
  Misses        6075    6075           

[thePeras]

seems good to me