docs: update version, deps and docs for 8.0 beta (#849)

* chore: up version and deps

* chore: use pnpm CLI to get versions

* add note for echarts 6 upgrade guide

* remove docs script

let cdn to redirect for us

* Revert "remove docs script"

This reverts commit 3bc237db9100864f2813249ac1693735a658e646.

* update demo links

scripts/docs.ts

@@ -0,0 +1,51 @@
+import { readFileSync, writeFileSync } from "node:fs";
+import { commentMark } from "comment-mark";
+import { getPackageVersions, resolvePath } from "./utils";
+
+const { name, version, devDependencies } = getPackageVersions([
+  "echarts",
+  "vue",
+]);
+
+const CDN_PREFIX = "https://cdn.jsdelivr.net/npm/";
+
+const DEP_VERSIONS = {
+  ...Object.fromEntries(
+    Object.entries(devDependencies).map(([name, { version }]) => [
+      name,
+      version,
+    ]),
+  ),
+  [name]: version,
+};
+
+function getScripts() {
+  return Object.entries(DEP_VERSIONS)
+    .map(([dep, version]) => {
+      const [, name] = dep.match(/^(.+?)(?:@.+)?$/) || [];
+      return `<script src="${CDN_PREFIX}${name}@${version}"></script>`;
+    })
+    .join("\n");
+}
+
+function getCodeBlock(code: string) {
+  return "\n```html\n" + code + "\n```\n";
+}
+
+const README_FILES = ["README.md", "README.zh-Hans.md"].map((name) =>
+  resolvePath(import.meta.url, "..", name),
+);
+
+README_FILES.forEach((file) => {
+  const content = readFileSync(file, "utf8");
+
+  writeFileSync(
+    file,
+    commentMark(content, {
+      vue3Scripts: getCodeBlock(getScripts()),
+    }),
+    "utf8",
+  );
+});
+
+console.log("README files updated.");