llm-cohere in plugin directory

!stable-docs

docs/plugins/directory.md

@@ -21,6 +21,7 @@ These plugins can be used to interact with remotely hosted models via their API:
 - **[llm-claude](https://github.com/tomviner/llm-claude)** by Tom Viner adds support for Claude and Claude Instant by Anthropic.
 - **[llm-openrouter](https://github.com/simonw/llm-openrouter)** provides access to models hosted on [OpenRouter](https://openrouter.ai/).
 - **[llm-anyscale-endpoints](https://github.com/simonw/llm-anyscale-endpoints)** supports models hosted on the [Anyscale Endpoints](https://app.endpoints.anyscale.com/) platform, including Llama 2 70B.
+- **[llm-cohere](https://github.com/Accudio/llm-cohere)** by Alistair Shepherd provides `cohere-generate` and `cohere-summarize` API models, powered by [Cohere](https://cohere.com/).
 
 If an API model host provides an OpenAI-compatible API you can also [configure LLM to talk to it](https://llm.datasette.io/en/stable/other-models.html#openai-compatible-models) without needing an extra plugin.