fix: update jwt package references and adjust token extraction methods

[lwnmengjing]

Description

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Type of change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

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Checklist:

• My code follows the style guidelines of this project
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• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
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[Copilot]

Pull Request Overview

The PR updates JWT package references and adjusts token extraction methods in the authentication middleware.

• Change JWT package alias from "jwt" to "ginJwt" for functions provided by appleboy's package.
• Add a new import for "github.com/golang-jwt/jwt/v4" to correctly reference token claims.

Files not reviewed (1)

• go.mod: Language not supported

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