Add llm-deepseek plugin (#517)

docs/plugins/directory.md

@@ -38,6 +38,7 @@ These plugins can be used to interact with remotely hosted models via their API:
 - **[llm-bedrock-anthropic](https://github.com/sblakey/llm-bedrock-anthropic)** by Sean Blakey adds support for Claude and Claude Instant by Anthropic via Amazon Bedrock.
 - **[llm-bedrock-meta](https://github.com/flabat/llm-bedrock-meta)** by Fabian Labat adds support for Llama 2 and Llama 3 by Meta via Amazon Bedrock.
 - **[llm-together](https://github.com/wearedevx/llm-together)** adds support for the [Together AI](https://www.together.ai/) extensive family of hosted openly licensed models.
+- **[llm-deepseek](https://github.com/abrasumente233/llm-deepseek)** adds support for the [DeepSeek](https://deepseek.com)'s DeepSeek-Chat and DeepSeek-Coder models.
 - **[llm-lambda-labs](https://github.com/simonw/llm-lambda-labs)** provides access to models hosted by [Lambda Labs](https://docs.lambdalabs.com/public-cloud/lambda-chat-api/), including the Nous Hermes 3 series.
 - **[llm-venice](https://github.com/ar-jan/llm-venice)** provides access to uncensored models hosted by privacy-focused [Venice AI](https://docs.venice.ai/), including Llama 3.1 405B.