Add some simple documentation

docs/Project_Structure.md

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+# Project Structure
+
+The project is structured this way
+
+```
+.
+├── docs                  Documentation folder
+├── public                Public folder in which the index.html
+│                           import its resources
+├── src                   Source folder for the react app
+│  ├── assets             Assets folder in which the react app
+│  │                        import its resources
+│  ├── Components         Components folder
+│  ├── Enums              Enums folder
+│  ├── Interfaces         Interface (+ types folder)
+│  ├── test               Setup folder for the tests
+│  ├── tests              Other tests + resources
+│  ├── utils              Utilities folder
+│  ├── index.scss         Tailwind CSS extends
+│  ├── main.tsx           Entrypoint for App injection
+│  └── vite-env.d.ts      Types for .env files
+├── test-server           Tests servers to test the API
+│  ├── http.js            Test server for bun.sh
+│  └── node-http.js       Test server for Node.js
+├── azure-pipelines.yml   Azure Pipelines YAML config file
+├── index.html            HTML Page
+├── package-lock.json     Describe the node_modules tree for npm
+├── package.json          Node.JS config file
+├── pnpm-lock.yaml        Describe the node_modules tree for pnpm
+├── postcss.config.cjs    Postcss config file for SCSS processing
+├── README.md
+├── tailwind.config.cjs   Tailwind CSS config file
+├── tsconfig.json         Typescript config file
+├── tsconfig.node.json    Typescript config file for Node modules
+├── vite.config.ts        Vite config file
+└── vitest.config.ts      Vitest config file
+```
+