Remove hardcoded configuration within the SS example

[erikziyunchi]

This PR removes the previous hardcoded configurations in the ShadowSocks example, and add the generic way of setting it up.

[sourcery-ai]

PR Type: Enhancement

PR Summary: The pull request introduces a more flexible configuration setup for the ShadowSocks example by removing hardcoded values and replacing them with a generic configuration structure. It adds a new SSConfig struct that includes fields for remote and local addresses, ports, password, and a bypass flag. The Connection struct is now generic to accommodate different configuration types, and the code has been updated to use the new configuration structure.

Decision: Comment

📝 Type: 'Enhancement' - not supported yet.

• Sourcery currently only approves 'Typo fix' PRs.

✅ Issue addressed: this change correctly addresses the issue or implements the desired feature.

No details provided.

✅ Small diff: the diff is small enough to approve with confidence.

No details provided.

General suggestions:

• Ensure that the new configuration structure is fully integrated and used consistently throughout the codebase.
• Verify that the removal of hardcoded values does not affect any existing functionality and that all necessary configurations are now properly sourced from the new structure.
• Consider the implications of cloning server address and encryption key on performance and refactor if necessary to avoid unnecessary cloning.
• Review the new configuration fields to ensure they cover all necessary use cases and that they are properly documented.

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[gaukas]

LGTM! Thanks for updating.