feat: 添加数据验证功能确保图像有效性

- 在项目依赖中添加了@hono/zod-validator和zod包。
- 添加依赖库"@hono/zod-validator"和"zod"以增强数据验证功能。
- 添加了请求验证以确保提供了有效的图像文件。

bun.lock

@@ -4,7 +4,9 @@
     "": {
       "name": "wxocr",
       "dependencies": {
+        "@hono/zod-validator": "^0.7.1",
         "hono": "^4.8.4",
+        "zod": "^4.0.5",
       },
       "devDependencies": {
         "@antfu/eslint-config": "^4.16.2",
@@ -67,6 +69,8 @@
 
     "@eslint/plugin-kit": ["@eslint/plugin-kit@0.3.3", "", { "dependencies": { "@eslint/core": "^0.15.1", "levn": "^0.4.1" } }, "sha512-1+WqvgNMhmlAambTvT3KPtCl/Ibr68VldY2XY40SL1CE0ZXiakFR/cbTspaF5HsnpDMvcYYoJHfl4980NBjGag=="],
 
+    "@hono/zod-validator": ["@hono/zod-validator@0.7.1", "", { "peerDependencies": { "hono": ">=3.9.0", "zod": "^3.25.0 || ^4.0.0" } }, "sha512-8+vJT1RvezAx5sN7hiZ5Mis0RMuFL77nBEcqQQgT9ufoLkxr+7ll461WlBJQcGoQSY6EGMClVae19v3s/7bbgQ=="],
+
     "@humanfs/core": ["@humanfs/core@0.19.1", "", {}, "sha512-5DyQ4+1JEUzejeK1JGICcideyfUbGixgS9jNgex5nqkW+cY7WZhxBigmieN5Qnw9ZosSNVC9KQKyb+GUaGyKUA=="],
 
     "@humanfs/node": ["@humanfs/node@0.16.6", "", { "dependencies": { "@humanfs/core": "^0.19.1", "@humanwhocodes/retry": "^0.3.0" } }, "sha512-YuI2ZHQL78Q5HbhDiBA1X4LmYdXCKCMQIfw0pw7piHJwyREFebJUvrQN4cMssyES6x+vfUbx1CIpaQUKYdQZOw=="],
@@ -633,6 +637,8 @@
 
     "yocto-queue": ["yocto-queue@0.1.0", "", {}, "sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q=="],
 
+    "zod": ["zod@4.0.5", "", {}, "sha512-/5UuuRPStvHXu7RS+gmvRf4NXrNxpSllGwDnCBcJZtQsKrviYXm54yDGV2KYNLT5kq0lHGcl7lqWJLgSaG+tgA=="],
+
     "zwitch": ["zwitch@2.0.4", "", {}, "sha512-bXE4cR/kVZhKZX/RjPEflHaKVhUVl85noU3v6b8apfQEc1x4A+zBxjZ4lN8LqGd6WZ3dl98pY4o717VFmoPp+A=="],
 
     "@eslint-community/eslint-utils/eslint-visitor-keys": ["eslint-visitor-keys@3.4.3", "", {}, "sha512-wpc+LXeiyiisxPlEkUzU6svyS1frIO3Mgxj1fdy7Pm8Ygzguax2N3Fa/D/ag1WqbOprdI+uY6wMUl8/a2G+iag=="],