chore(editorconfig): remove csproj encoding config

[ArgoZhang]

Link issues

fixes #7282

Summary By Copilot

Regression?

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• No

Risk

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• Medium
• Low

Verification

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• Automated

Packaging changes reviewed?

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☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Merge the latest code from the main branch

Summary by Sourcery

Enhancements:

• Clean up .editorconfig by dropping obsolete csproj encoding configuration.

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[Copilot]

Pull request overview

This PR removes a redundant configuration section for .csproj files in .editorconfig. The removed settings (charset = utf-8 and insert_final_newline = true) are already covered by the global [*] section, making the dedicated [*.csproj] section unnecessary.

• Removes duplicate [*.csproj] section that specified charset and insert_final_newline properties already defined globally

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (ee29501) to head (1cfb3bc).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #7283   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          745       745           
  Lines        32628     32628           
  Branches      4522      4522           
=========================================
  Hits         32628     32628           

Flag	Coverage Δ
BB	100.00% <ø> (?)

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