feat: enhance oxlint config support

[ntnyq]

Description

This PR add oxlint.config.ts support to oxc.

Refs:

• feat(linter): implement oxlint.config.ts support oxc-project/oxc#17563
• https://oxc.rs/docs/guide/usage/linter/config.html#create-a-config-file

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[Copilot]

Pull request overview

Adds support in the icon theme’s core file icon mapping so that oxlint.config.ts is recognized and displayed with the existing oxc file icon.

Changes:

• Register oxlint.config.ts under the oxc file icon definition.

[github-actions]

Merge Successful

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