docs: update to remove all super old, badly formatted or otherwise wrong docs.

Author: tomolopolis

docs/index.md

@@ -8,14 +8,7 @@ Any broad questions then please do reach out in our community space [here](https
 
 Further in development projects are [here](https://github.com/orgs/CogStack/repositories)
 
-![](./overview/attachments/43c14755-e565-4ae0-a0a3-ec6dc18a691c.png)
-
-| Tool | Description |
-|:-----|:------------|
-| ![CogStack-Nifi](overview/attachments/36c0d23f-a632-4fbf-9f7c-6669e88bbd39.png){width=100} <br/> [**CogStack-Nifi**](https://cogstack-nifi.readthedocs.io/en/latest/main.html) | Data flow orchestration using Apache NiFi |
-| ![MedCAT](overview/attachments/09a8bb60-9864-41fa-be7b-cf9a9dc04498.png){width=100} <br/> [**MedCAT**](https://medcat.readthedocs.io/en/latest/) | Medical Concept Annotation Toolkit |
-| ![MedCATTrainer](overview/attachments/09a8bb60-9864-41fa-be7b-cf9a9dc04498.png){width=100} <br/> [**MedCATTrainer**](https://medcattrainer.readthedocs.io/en/latest/) | Web-based annotation and training interface for MedCAT |
-
+![](./overview/attachments/architecture.png){width=2000}
 
 ```{toctree}
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