[dajiaohuang]

Problem

Copying the README's complete configuration example into a file and loading it with --load-config exits with unknown variant Username: the column kind is User.

The same reference also lists the nonexistent WriteByte kind and the literal Color256 as an available style/color. The parser accepts WriteBytes and numeric-string palette entries such as "223", not those listed tokens.

Change

Correct these configuration instructions together and add a pure parsing regression for the README's complete TOML example. No production behavior changes.

Validation

• The original example fails through the CLI configuration loader before process collection; the parsing regression fails on base and passes after the correction.
• Regression passes with default features and --no-default-features on Windows x86_64, Rust 1.98.1.
• Verified the corrected kind and palette tokens with the production configuration parser.
• cargo fmt -- --check passes.
• Full process-collecting tests were not run on the shared host. Clippy reports the same five pre-existing unnecessary casts at src/columns/priority.rs:140–144 on base and the audited changes, in both feature configurations.