chore: add vant-cli pacakge

packages/vant-cli/src/changelog.js

@@ -0,0 +1,25 @@
+const path = require('path');
+const shelljs = require('shelljs');
+
+function changelog(dist, cmd) {
+  const basepath = process.cwd();
+  const tag = cmd.tag || 'v1.0.0';
+
+  shelljs.exec(`
+    basepath=${basepath}
+
+    github_changelog_generator \
+      --header-label "# 更新日志" \
+      --bugs-label "**Bug Fixes**" \
+      --enhancement-label "**Breaking changes**" \
+      --issues-label "**Issue**" \
+      --pr-label "**Improvements**" \
+      --no-issues \
+      --no-unreleased \
+      --since-tag ${tag} \
+      -o ${path.join(basepath, dist)}
+    `
+  );
+}
+
+module.exports = changelog;

packages/vant-cli/src/index.js

@@ -0,0 +1,11 @@
+#!/usr/bin/env node
+
+const commander = require('commander');
+const changelog = require('./changelog');
+
+commander
+  .command('changelog <dir>')
+  .option('--tag [tag]', 'Since tag')
+  .action(changelog);
+
+commander.parse(process.argv);