chore: add bun cursor rule

Author: fadi-george

.cursor/rules/bun.mdc

@@ -0,0 +1,14 @@
+---
+description: Use Bun instead of Node.js, npm, pnpm
+globs: '*.ts, *.tsx, *.html, *.css, *.js, *.jsx, package.json'
+alwaysApply: false
+---
+
+Default to using Bun instead of Node.js.
+
+- Use `bun <file>` instead of `node <file>` or `ts-node <file>`
+- Use `bun build <file.html|file.ts|file.css>` instead of `webpack` or `esbuild`
+- Use `bun install` instead of `npm install` or `yarn install` or `pnpm install`
+- Use `bun run <script>` instead of `npm run <script>` or `yarn run <script>` or `pnpm run <script>`
+- Use `bunx <package> <command>` instead of `npx <package> <command>`
+- Bun automatically loads .env, so don't use dotenv.