chore: update arch diagrams (#1120)

## Description

Not much changed between updates, just some cleanup and clearer naming
practices.


## Type of change

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [x] Other (security config, docs update, etc)


## Checklist before merging

- [x] Test, docs, adr added or updated as needed
- [x] [Contributor
Guide](https://github.com/defenseunicorns/uds-template-capability/blob/main/CONTRIBUTING.md)
followed

README.md

@@ -113,3 +113,8 @@ uds run test-single-layer --set LAYER=identity-authorization
 ```
 
 Note you can specify the `--set FLAVOR=registry1` flag to test using Iron Bank images instead of the upstream images.
+
+## UDS Core Architecture Overview
+![UDS Core Architecture Diagram](https://github.com/defenseunicorns/uds-core/blob/main/docs/.images/uds-core-arch-overview.svg?raw=true)
+
+Diagrams are located in `/docs/.images`. See the [diagram README](./docs/.images/README.md) for an explanation and help customizing.

docs/.images/README.md

@@ -0,0 +1,22 @@
+# UDS Core Diagrams
+
+## Diagram Explanations
+At this time there are three layers to our diagram that visually explain the following:
+
+1. `Overview`, basic view of what applications are present and what other services/applications they are communicating with.
+
+2. `Traffic Direction`, similar to `Overview` layer with the addition of directional arrows to represent the flow of traffic in cluster.
+
+3. `Ports and Protocols`, similar to `Traffic Direction` layer with the addition of ports and protocols.
+
+## How to Customize
+To customize the diagram, download the svg and in [draw.io](https://draw.io) create a new diagram and load in the svg.
+
+To download the [svg from github](https://github.com/defenseunicorns/uds-core/tree/main/docs/.images), select one of the svg files, then select the download button in the top right of the `Preview` view.
+
+Alternatively you can also download the svg from the [uds.defenseunicorns.com](https://uds.defenseunicorns.com/reference/uds-core/overview/) docsite by right clicking and selecting the `Save image as` option.
+
+It doesn't matter which svg you download, they all contain the metadata for the other layers mentioned above (you may need to enable the layers pop up in [draw.io](https://draw.io) to change your layer).
+
+
+#### If you have suggestions for the diagrams, we welcome issues or pull requests contributions to [uds-core](https://github.com/defenseunicorns/uds-core).