sqf: Add S53 - Detect substring comparison len mismatch

[PabstMirror]

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[codecov]

Codecov Report

❌ Patch coverage is 78.89908% with 23 lines in your changes missing coverage. Please review.
✅ Project coverage is 69.3%. Comparing base (e5c1276) to head (cdd0a8d).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
.../sqf/src/analyze/lints/s53_select_substring_len.rs	78.8%	23 Missing ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
.../sqf/src/analyze/lints/s53_select_substring_len.rs	78.8% <78.8%> (ø)

... and 5 files with indirect coverage changes

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