Improve Gallery Editor UX in AGS

[victordibia]

Why are these changes needed?

Fixes the problem where Gallery items could only be modified via JSON

This PR does the following

• Refactor TeamBuilder to have modular component editor UI primarily focused on editing each component type.
• Refactor the Gallery UX
  • improve layout to use tabs for each component type
  • enable editing of each component item by reusing the component editor
• Enable switching between form editing and UI editing for coponent editor view

This way, gallery items can be readily modified and then reused in the component library in team builder.
It also implements an upate to the Gallery data structure to make it more intuitive - it has a components field that has teams, agents, models ...

Related issue number

Closes #5465
Closes #5047

cc @nour-bouzid @balakreshnan @EItanya @joslat @IustinT @LeonG7

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://github.com/microsoft/autogen/blob/main/CONTRIBUTING.md to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.41%. Comparing base (34d30b5) to head (ff7af4c).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5613   +/-   ##
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  Coverage   75.41%   75.41%           
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  Files         171      171           
  Lines       10467    10467           
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  Hits         7894     7894           
  Misses       2573     2573           

Flag	Coverage Δ
unittests	75.41% <ø> (ø)

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