build(deps): Migrate to human-errors v0.2.2

[Copilot]

Migrates from human-errors v0.1.5 to v0.2.2, adopting the new error handling API following the pattern established in github-backup#453.

API Changes

• Removed: error_shim!() macro
• Replaced error construction:
  • errors::user_with_internal() → ResultExt::wrap_err_as_user()
  • errors::system_with_internal() → ResultExt::wrap_err_as_system()
  • errors::user() → human_errors::user()
• Error display: Added human_errors::pretty() for formatted output

Migration Pattern

Before:

std::fs::read_to_string(source).map_err(|e| {
    crate::errors::user_with_internal(
        "Failed to read your configuration file.",
        "Make sure that the file exists and you have permission to access it.",
        e,
    )
})?

After:

use human_errors::ResultExt;

std::fs::read_to_string(source).wrap_err_as_user(
    "Failed to read your configuration file.",
    &["Make sure that the file exists and you have permission to access it."],
)?

Dependencies

• Enabled pretty feature for enhanced error formatting
• Updated error messages from &str to String (via format!())
• Changed advice parameters from single strings to &[&str] arrays

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