Point the inspector at hive_ce_flutter 3.0

[Rexios80]

Summary

• Depend on unpublished hive_ce_flutter 3.0 via path override
• Import TimeOfDay from package:material_ui in the adapter round-trip test
• Upgrade rexios_lints to 19 and disable migrate_design_widgets (DevTools still hosts SDK Material)

Test plan

• flutter test in hive_ce_inspector
• dart analyze --fatal-infos in hive_ce_inspector on Dart 3.13 / Flutter 3.47

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.44%. Comparing base (535ba67) to head (6e2d190).

Additional details and impacted files

@@                     Coverage Diff                      @@
##           feature/hive_ce_flutter-3.0     #316   +/-   ##
============================================================
  Coverage                        93.44%   93.44%           
============================================================
  Files                               64       64           
  Lines                             2623     2623           
============================================================
  Hits                              2451     2451           
  Misses                             172      172           

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