chore(deno): finish import extensions for sites/mp-sync paths

- sites/mp-sync relative imports already carry extensions; drop the biome
  useImportExtensions override and --unstable-sloppy-imports in typecheck:deno
- mp-sync scripts: deno shebang (+x), static `import YAML from "yaml"`,
  README/usage switched to `deno run -A`
- verified: check.mjs --to e6820a8 (49 unchanged), movieclaw-import --check (0 diff)

Co-Authored-By: Claude Fable 5.1 <[email protected]>

scripts/mp-sync/movieclaw-import.mjs

@@ -1,9 +1,9 @@
-#!/usr/bin/env node
+#!/usr/bin/env -S deno run -A
 /**
  * MovieClaw v0.27.0(MIT)站点 YAML → 本项目 SiteDefinition JSON 转换器(可重复执行)。
  *
  * 用法:
- *   node scripts/mp-sync/movieclaw-import.mjs [--repo spikes/movieclaw-src/repo] [--ref v0.27.0] [--check]
+ *   deno run -A scripts/mp-sync/movieclaw-import.mjs [--repo spikes/movieclaw-src/repo] [--ref v0.27.0] [--check]
  *
  * - 只用 `git show <ref>:<path>` 读取文件(固定 tag,不读工作区,避免混入许可切换后的内容)。
  * - 校验 <ref> 解析到的提交与 LICENSE 为 MIT;ref 不是 v0.27.0 时要求 --allow-ref(许可需另行核对)。
@@ -17,29 +17,12 @@
  */
 import { execFileSync } from "node:child_process";
 import { existsSync, readdirSync, readFileSync, writeFileSync } from "node:fs";
-import { createRequire } from "node:module";
 import { dirname, join, resolve } from "node:path";
 import { fileURLToPath } from "node:url";
+import YAML from "yaml";
 
 const ROOT = resolve(dirname(fileURLToPath(import.meta.url)), "../..");
 
-/** yaml 解析器:Deno(根 deno.json import map)或 Node(node_modules)均可 */
-async function loadYaml() {
-  try {
-    return (await import("yaml")).default;
-  } catch {
-    for (const base of ["packages/adapters/package.json", "package.json"]) {
-      try {
-        return createRequire(join(ROOT, base))("yaml");
-      } catch {
-        /* next */
-      }
-    }
-  }
-  throw new Error("找不到 yaml 包:请用 `deno run -A scripts/mp-sync/movieclaw-import.mjs` 运行");
-}
-const YAML = await loadYaml();
-
 const args = process.argv.slice(2);
 const opt = (name, def) => {
   const i = args.indexOf(name);