add installation packages category to community

Moved the arch package and someone has added a pr for brew.
that needs to get updated to be a link.

Signed-off-by: Matt Williams <m@technovangelist.com>

README.md

@@ -240,9 +240,12 @@ See the [API documentation](./docs/api.md) for all endpoints.
 - [ollama.nvim](https://github.com/nomnivore/ollama.nvim)
 - [ogpt.nvim](https://github.com/huynle/ogpt.nvim)
 - [gptel Emacs client](https://github.com/karthink/gptel)
-- [ollama package for archlinux](https://archlinux.org/packages/extra/x86_64/ollama/)
 - [Oatmeal](https://github.com/dustinblackman/oatmeal)
 
+### Installation Packages
+
+- [Package for archlinux](https://archlinux.org/packages/extra/x86_64/ollama/)
+
 ### Libraries
 
 - [LangChain](https://python.langchain.com/docs/integrations/llms/ollama) and [LangChain.js](https://js.langchain.com/docs/modules/model_io/models/llms/integrations/ollama) with [example](https://js.langchain.com/docs/use_cases/question_answering/local_retrieval_qa)