refactor: Migrate from snafu to thiserror

Cargo.lock

Cargo.toml

src/bundle/mod.rs

src/bundle/packager.rs

src/bundle/poller.rs

src/bundle/s3/packager.rs

src/bundle/s3/poller.rs

src/cli/bundle.rs

src/cli/serve.rs

src/config.rs

src/files/path.rs

src/files/path_context.rs

src/files/pathbuf.rs

src/files/service.rs

src/main.rs

src/server.rs

src/stats.rs