feat: OpsxDB 桌面数据库客户端首版入库

含工作台/连库多引擎字段与 SSH·SSL、结果编辑、Redis 键浏览、
Tauri 桌面与 docs/落地页；排除本地构建产物与 sidecar 二进制。

package.json

@@ -0,0 +1,18 @@
+{
+  "name": "opsxdb",
+  "private": true,
+  "workspaces": [
+    "apps/web",
+    "packages/*"
+  ],
+  "scripts": {
+    "dev:web": "npm run dev -w @opsxdb/web",
+    "build:web": "npm run build -w @opsxdb/web",
+    "test:core": "npm run test -w @opsxdb/core",
+    "dev:desktop": "npm --prefix apps/desktop run tauri -- dev",
+    "build:desktop": "npm --prefix apps/desktop run tauri -- build"
+  },
+  "engines": {
+    "node": ">=20"
+  }
+}