The `enable-ansi-support` crate is only required on Windows to enable ANSI escape codes in the terminal. On other operating systems, this functionality is native. This change restricts the dependency to Windows targets and wraps its usage in a `#[cfg(target_os = "windows")]` block, reducing the dependency footprint for non-Windows builds.

…roto

Merges the `yara-x-proto-json` and `yara-x-proto-yaml` crates into the
main `yara-x-proto` crate.

This streamlines the project structure by reducing the number of top-level
crates and logically groups all protobuf-related functionalities under a
single crate. JSON and YAML serializers are now exposed as `yara_x_proto::json`
and `yara_x_proto::yaml` modules.