upgrade: update flutter to 3.44.4, ignore rive in renovate

[AlexV525]

Changes

• Flutter 3.44.4: Updates .tool-versions from 3.41.1-stable to 3.44.4-stable (supersedes upgrade: update dependency flutter to v3.44.2 #762 which was at 3.44.2)
• Ignore rive: Adds rive to ignoreDeps in renovate.json (closes upgrade: update dependency rive to ^0.14.0 #746)

Closes #762
Closes #746

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.37%. Comparing base (009aa10) to head (7e94bc8).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #770   +/-   ##
=======================================
  Coverage   97.37%   97.37%           
=======================================
  Files          24       24           
  Lines         989      989           
=======================================
  Hits          963      963           
  Misses         26       26           

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