chore: Upgrade React to v19 in demo

[nishu-murmu]

This closes #1268

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.14%. Comparing base (0137d79) to head (4dde0b6).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1280      +/-   ##
==========================================
- Coverage   81.18%   81.14%   -0.04%     
==========================================
  Files         128      128              
  Lines        6286     6286              
  Branches     1065     1067       +2     
==========================================
- Hits         5103     5101       -2     
- Misses       1168     1170       +2     
  Partials       15       15              

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[aklinker1]

Thanks, looks good! We can ignore the failed check, just because this PR is a fork.

[aklinker1]

Do we also need to upgrade @wxt-dev/module-react?

[nishu-murmu]

Do we also need to upgrade @wxt-dev/module-react?

I thought as we or rather you are developing, we might need latest version for testing purposes, as I've often used wxt-demo for fixing bugs and all,
Also just to be in sync with the latest version. If you feel otherwise then I'll revert it back.

[aklinker1]

I haven't looked into what's required for react 19, but if we're updating the template, then that's what devs will use in their projects and we need to update the module as well.

[nishu-murmu]

So this is correct right?