docs: add value proposition to Other Frameworks section explaining unified generation benefits

Signed-off-by: spencercjh <spencercjh@gmail.com>

Author: spencercjh

README.md

@@ -142,6 +142,11 @@ OpenAPI docs. Spec Forge wraps `protoc-gen-connect-openapi` — a maintained, Op
 **Hertz / Kitex (CloudWeGo)** — Official OpenAPI docs are outdated. Spec Forge will wrap the working tools from
 `hertz-contrib/swagger-generate` into a single command (coming soon).
 
+**Why use Spec Forge when frameworks have their own tools?** Each framework's ecosystem requires different setup,
+dependencies, and CI configurations. Spec Forge reduces integration cost by providing a unified generation interface — one
+command, one config file, consistent output across all your services. This enables centralized CI/CD pipelines that
+generate, validate, enrich, and publish API documentation automatically, regardless of which framework each team chose.
+
 ---
 
 ## How It Works

README.zh_CN.md

@@ -117,6 +117,8 @@ LLM **从不** 虚构类型或改变结构 —— 它只为我们已经验证存
 
 **Hertz / Kitex (CloudWeGo)** —— 官方 OpenAPI 文档已过时。Spec Forge 将把 `hertz-contrib/swagger-generate` 中的可用工具封装成一条命令（即将推出）。
 
+**为什么框架已有文档工具还需要 Spec Forge？** 每个框架的生态需要不同的设置、依赖和 CI 配置。Spec Forge 通过提供统一的生成界面来降低接入成本 —— 一条命令、一个配置文件，跨所有服务输出一致的规范。这使得集中式 CI/CD 流水线能够自动生成、验证、增强和发布 API 文档，无论各团队选择了哪种框架。
+
 ---
 
 ## 工作原理