fix: Set a maximum size of page contents

[ashuntu]

Sets a maximum width for page content, equal to their current effective width.

Here's a comparison for this change (maximized on a 1440p screen):

Old	New

The default size of the app remains unchanged.

This diff is really just the content being wrapped with a new widget, nothing else changed

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UDENG-5684

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.14%. Comparing base (5295e58) to head (fc0e6b0).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1042   +/-   ##
=======================================
  Coverage   89.14%   89.14%           
=======================================
  Files         112      112           
  Lines        7498     7499    +1     
=======================================
+ Hits         6684     6685    +1     
  Misses        637      637           
  Partials      177      177           

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[CarlosNihelton]

Great!

It feels as though GH created the "Hide whitespace" feature for Flutter developers :)