[WEB] Upgrade React to 19

[merobi-hub]

Problem

Now that React is on 18.3, we can easily upgrade to 19.

Solution

Upgrade React to 19, including the relevant types.

One-line summary: upgrade React to 19

Checklist

• You've signed-off your work
• Your changes are accompanied by tests (if relevant)
• Your change contains a small diff and is self-contained
• You've updated any relevant documentation (if relevant)
• You've included a one-line summary of your change for the CHANGELOG.md (Depending on the change, this may not be necessary).
• You've versioned your .sql database schema migration according to Flyway's naming convention (if relevant)
• You've included a header in any source code files (if relevant)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.18%. Comparing base (386885f) to head (e365d7f).

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #3097   +/-   ##
=========================================
  Coverage     81.18%   81.18%           
  Complexity     1506     1506           
=========================================
  Files           268      268           
  Lines          7356     7356           
  Branches        325      325           
=========================================
  Hits           5972     5972           
  Misses         1226     1226           
  Partials        158      158           

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