feat: 新增共享加密包并引入 ZIP/PGP 依赖

packages/crypto/src/hash.ts

@@ -0,0 +1,15 @@
+import { createHash } from 'node:crypto'
+
+/**
+ * Compute SHA-256 hash and return raw Buffer.
+ */
+export const sha256 = (data: string | Buffer): Buffer => {
+  return createHash('sha256').update(data).digest()
+}
+
+/**
+ * Compute SHA-256 hash and return lowercase hex string.
+ */
+export const sha256Hex = (data: string | Buffer): string => {
+  return createHash('sha256').update(data).digest('hex')
+}