refactor: simplification

[rustatian]

Reason for This PR

Remove duplicate work from configuration flag parsing.

Description of Changes

• Split flags once with strings.Cut and remove an unreachable error branch.
• Build escaped quote strings without formatted output.

License Acceptance

By submitting this pull request, I confirm that my contribution is made under the terms of the MIT license.

PR Checklist

• All commits in this PR are signed (git commit -s).
• The reason for this PR is clearly provided (issue no. or explanation).
• The description of changes is clear and encompassing.
• Any required documentation changes (code and docs) are included in this PR.
• Any user-facing changes are mentioned in CHANGELOG.md.
• All added/changed functionality is tested.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.35%. Comparing base (f0bb3ae) to head (f380c95).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #112      +/-   ##
==========================================
+ Coverage   98.71%   99.35%   +0.63%     
==========================================
  Files           3        3              
  Lines         156      154       -2     
==========================================
- Hits          154      153       -1     
+ Misses          2        1       -1     

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[Copilot]

Copilot review overview

🟢 Approval recommended

The refactor preserves existing behavior and remains covered by current parsing tests.

Review effort: Balanced
Findings: None

What changed in this PR

Simplifies configuration flag parsing without changing behavior.

Changes:

• Uses strings.Cut to parse flags once.
• Replaces formatted quote escaping with string concatenation.

File	Description
plugin.go	Simplifies flag splitting and escaped-quote construction.

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