feat: convert introduction.typ to README.md (#479)

* dev: supports some functions for README

* feat: convert introduction.typ to README.md

scripts/link-docs.mjs

@@ -0,0 +1,48 @@
+
+import {resolve} from 'path';
+import {fileURLToPath} from 'url';
+import * as fs from 'fs';
+import {execSync} from 'child_process';
+
+const filename = fileURLToPath(import.meta.url);
+const root = resolve(filename, '../..');
+const dry = process.argv.includes('--dry');
+
+const yarn = (cmd, stdio = 'inherit') => {
+    const script = `yarn run ${cmd}`;
+    if (dry) {
+        return script;
+    }
+    return execSync(script, {stdio});
+};
+const typlite = (input, output = "-") => {
+    if (output === "-") {
+        // return stdout
+        const res = yarn(`--silent typlite ${input} -`, 'pipe');
+        return res.toString();
+    }
+
+    return yarn(`typlite ${input} ${output}`);
+};
+
+const convert = async (inp, out, opts) => {
+    const input = resolve(root, inp);
+    const output = resolve(root, out);
+    const { before } = opts || {};
+
+    const res = typlite(input).trim();
+    if (dry) {
+        console.log(res);
+        return;
+    }
+
+    await fs.promises.writeFile(output, `<!-- This file is generated by scripts/link-docs.mjs from ${inp}. Do not edit manually. -->\n${before || ''}${res}\n`);
+};
+
+const main = async () => {
+    await Promise.all([
+        convert('docs/tinymist/introduction.typ', 'README.md', { before: "# Tinymist\n\n" }),
+    ])
+};
+
+main().catch(console.error);