Expose `with_ansi` and `with_ansi_sanitization` for `Writer`

Feature Request

Crates

tracing_subscriber

Motivation

There's only way to output ANSI colors in level and other fields for event formatter is to use default event formatters. If one desires to output e.g. log level in way other than default, it's impossible to write custom event writer with ANSI output.

Proposal

replace pub(crate) to pub. There's also comments asking to expose these methods.

Alternatives