Delete the obsolete ft8_lib submodule and update documentation to point at the pure Rust trx-ftx decoder. Co-authored-by: OpenAI Codex <codex@openai.com> Signed-off-by: Stan Grams <sjg@haxx.space>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> Signed-off-by: Stan Grams <sjg@haxx.space>