Add examples

What's Changed

• Add slog/16.discard-handler by @devlights in #889
• Add examples/testing/16.go124_benchmark_loop by @devlights in #890
• Add singleapp/hexagonal_architecture by @devlights in #891
• Add socket/tcp_fin_rst by @devlights in #892
• Add basic/bufferop/to_readwritecloser.go by @devlights in #893
• Add socket/tcp_textproto example by @devlights in #894
• Add socket/tcp_textproto_pipeline example by @devlights in #895

Full Changelog: v0.5.35...v0.5.36