Add README.md for the Vegravis project

📄(README): created README.md

which introduces and gives important details about the Vegravis project. The file notably contains an introduction, a snapshot of the application, installation instructions, features list, and licensing details.

Signed-off-by: Benign X <[email protected]>

README.md

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+<img height="256" src="assets/maskable_icon_x512.png" alt="Vegravis Logo" align="right"/>
+<div style="display: flex; justify-content: space-between; flex:8">
+<h1 align="left">Vegravis</h1>
+
+<div align="left">
+<img src="https://img.shields.io/static/v1?label=Awesome&message=Project&style=for-the-badge&color=blue&logo=glass" alt="Awesome Badge"/>
+
+<a href="https://jq.qq.com/?_wv=1027&k=8Z9w4LGN"><img src="https://img.shields.io/badge/QQ%20Group-join-black?style=for-the-badge&logo=linux" alt="Join Community Badge"/></a>
+<br>
+
+<i>Vector Graphics Visualizer</i>
+
+<a href="https://github.com/W-Mai/vegravis/stargazers"><img src="https://img.shields.io/github/stars/W-Mai/vegravis?style=for-the-badge&" alt="Stars Badge"/></a>
+<a href="https://github.com/W-Mai/vegravis/network/members"><img src="https://img.shields.io/github/forks/W-Mai/vegravis?style=for-the-badge&" alt="Forks Badge"/></a>
+<a href="https://github.com/W-Mai/vegravis/issues"><img src="https://img.shields.io/github/issues/W-Mai/vegravis?style=for-the-badge&" alt="Issues Badge"/></a>
+<a href="https://github.com/W-Mai/vegravis/blob/master/LICENSE"><img src="https://img.shields.io/github/license/W-Mai/vegravis?color=2b9348&style=for-the-badge&" alt="License Badge"/></a>
+
+</div>
+</div>
+
+<img src="snapshots/snapshot.png">
+
+## Introduction
+
+Vegravis is a vector graphics visualizer.
+It can visualize vector graphics on a canvas, and can also visualize vector graphics in other formats through
+conversion.
+
+like codes below:
+
+```shell
+// Sakaban Turtle
+move, -100, 0,
+quad, 0,-10,100, 0,
+cubi, 100, -100, -100, -100, -100, 0,
+cubi, -100, 100, 100, 100, 100, 0,
+move, 70, 30,
+cubi, 70, 55, 30, 55, 30, 30,
+cubi, 30, 5, 70, 5, 70, 30,
+
+move, 55, 30,
+cubi, 55, 40, 45, 40, 45, 30,
+cubi, 45, 20, 55, 20, 55, 30,
+
+move, -70, 30,
+cubi, -70, 55, -30, 55, -30, 30,
+cubi, -30, 5, -70, 5, -70, 30,
+
+move, -55, 30,
+cubi, -55, 40, -45, 40, -45, 30,
+cubi, -45, 20, -55, 20, -55, 30,
+
+move, 30, -4,
+quad, 0, -60, -30, -4
+```
+
+and you will get a cute Sakaban Turtle:
+
+<img src="snapshots/sakaban.png" width="200">
+
+## Features
+
+- [x] Visualize vector graphics
+- [x] Support cross-platform (**Windows**, **Linux**, **MacOS**, **Web**)
+- [ ] Support multiple vector graphics formats
+- [ ] Support vector graphics editing
+- [ ] Support vector graphics animation
+- [x] Support custom vector grammar
+- [x] Support custom vector grammar editor
+- [x] Support grammar error detection
+- [ ] ...
+
+## LICENSE
+
+MIT