Add spacing between sections in README for improved readability

Author: robertpiosik

README.md

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   <a href="https://marketplace.visualstudio.com/items?itemName=robertpiosik.gemini-coder"><img src="https://img.shields.io/badge/Install-VS_Code_Marketplace-blue" alt="Get from Visual Studio Code Marketplace" /></a> <a href="https://open-vsx.org/extension/robertpiosik/gemini-coder"><img src="https://img.shields.io/badge/Install-Open_VSX_Registry-a60ee5" alt="Get from Open VSX Registry" /></a> <a href="https://github.com/robertpiosik/CodeWebChat/blob/dev/LICENSE"><img src="https://img.shields.io/badge/License-GPL--3.0-green.svg" alt="GPL-3.0 license" /></a>
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 Code Web Chat is an open-source and privacy-first **AI coding toolkit for VS Code**. It helps construct prompts for a chatbot's smart workspaces (called [projects](https://help.openai.com/en/articles/10169521-projects-in-chatgpt), also [gems](https://gemini.google/pl/overview/gems) or [spaces](https://docs.github.com/en/copilot/concepts/context/spaces)) and APIs. **It's free!**
 
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 <p align="center"><img src="https://github.com/robertpiosik/CodeWebChat/raw/HEAD/packages/shared/src/media/screenshot-1.png"></p>
 
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 <p align="center"><i>Iterate in a chatbot...</i></p>
 
 <p align="center"><img src="https://github.com/robertpiosik/CodeWebChat/raw/HEAD/packages/shared/src/media/screenshot-2.png"></p>
 
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 <p align="center"><i>Apply response from clipboard...</i></p>
 
 <p align="center"><img src="https://github.com/robertpiosik/CodeWebChat/raw/HEAD/packages/shared/src/media/screenshot-3.png"></p>
 
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 > [!TIP]
 > Don't want to make edits in chatbots? CWC supports remote and local (e.g. Ollama) model providers.