feat: update file icon patterns for Rspress and Rslint

[chenjiahan]

Description

Update file icon patterns for Rspress and Rslint:

• Rspress supports rspress.config.*
• Rslint recently added support for rslint.config.*, see https://rslint.rs/config/

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[Copilot]

Pull request overview

Updates the rstack file icon mappings to recognize newer configuration file naming conventions for Rspress and Rslint within the icon theme’s core file-icon registry.

Changes:

• Moves rspress.config.* matching from a single explicit filename to a pattern-based match.
• Adds a new pattern entry intended to support rslint.config.*.
• Keeps existing explicit support for rslint.json and rslint.jsonc.

[PKief]

Thanks for the changes, looks good to me

[github-actions]

Merge Successful

Thanks for your contribution! 🎉

The changes will be part of the upcoming update on the Marketplace.