docs: basic README

README.md

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+# Tiny Tapeout VGA Playground
+
+Online version: https://tinytapeout.github.io/vga-playground/
+
+Write an run verilog code to generate VGA signals in the browser, then manufacture your project with [Tiny Tapeout](https://tinytapeout.com/).
+
+## Development
+
+You'll need to have [Node.js](https://nodejs.org) installed on your computer and clone this repository.
+
+Then you can install the dependencies and run the development server:
+
+```bash
+npm install
+npm start
+```
+
+To view the playground, open `http://localhost:5173` in your browser.