Update dependency dart_code_linter to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
dart_code_linter (source)	dev_dependencies	major	^3.0.0 → 4.0.0

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Release Notes

bancolombia/dart-code-linter (dart_code_linter)

v4.0.0

Compare Source

• BREAKING: Update minimum Dart SDK to >=3.5.0 (compatible with Flutter 3.24+).
• Update analyzer to >=11.0.0 <12.0.0.
• Update analyzer_plugin to ^0.14.5.
• Fix element comparison for substituted elements in always-remove-listener rule.
• Add Packaged AI Assets for MCP integration (extension/mcp/).

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