chore: add system architecture to README.md (#132)

### Description
<!-- Please add PR description (don't leave blank) - example: This PR
[adds/removes/fixes/replaces] the [feature/bug/etc] -->

This PR adds the project system architecture diagram to the README of
the repo. This is a link to the `version-1` system architecture.


https://excalidraw.com/#json=51IqiNvrZiY15ZtjK0WXn,jcpW9rmzMR9OVwM05Zd1LQ

Author: babblebey

README.md

@@ -10,14 +10,18 @@
 
 <tt>jargons.dev</tt> is an open source dictionary curated by contributors providing simplified meaning and definitions to software development, engineering, and general technology terms.
 
-## Tech Stack
+## Tech Stack and Architecture
 
 <tt>jargons.dev</tt> is built using the following open source technologies: 
 
 - [Astro](https://astro.build/) - Web framework for building content-driven websites
 - [React](https://react.dev) - Library for building web interfaces
 - [Tailwind CSS](https://tailwindcss.com) - A Utility-first CSS Library
 
+### System Architecture
+
+See https://excalidraw.com/#json=51IqiNvrZiY15ZtjK0WXn,jcpW9rmzMR9OVwM05Zd1LQ
+
 ## Run Project Locally
 
 To run the project locally running on your machine, follow these simple steps.