Move some READMEs to files and add transclude scripts

TranscludeReadmes.js

@@ -0,0 +1,21 @@
+#!/usr/bin/env node
+const fs = require('fs');
+const dir = require('process').argv.slice(-1)[0];
+const readme = `${dir}/README.md`;
+if (fs.existsSync(readme)) {
+	let index;
+	for (const ext of ['js', 'html']) {
+		const path = `${dir}/index.${ext}`;
+		if (fs.existsSync(path)) {
+			index = path;
+			break;
+		}
+	}
+	if (index) {
+		fs.writeFileSync(
+			index,
+			fs.readFileSync(index, 'utf8').replaceAll(
+				'<!-- <README /> -->',
+				fs.readFileSync(readme, 'utf8').split('---').slice(1).join('---').trim()));	
+	}
+}