REFACTOR: Add browse to script file in Extension manager

[hui-zhou-a]

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Issue linked

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Checklist

• I have tested my changes locally.
• I have added necessary documentation or updated existing documentation.
• I have followed the coding style guidelines of this project.
• I have added appropriate tests (unit, integration, system).
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.23%. Comparing base (11e2fdd) to head (97f0ab7).
Report is 15 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5657      +/-   ##
==========================================
- Coverage   85.23%   85.23%   -0.01%     
==========================================
  Files         154      154              
  Lines       60764    60764              
==========================================
- Hits        51795    51794       -1     
- Misses       8969     8970       +1