docs: add logLevel config

website/docs/en/config/log-level.mdx

@@ -0,0 +1,36 @@
+# logLevel
+
+- **Type:** `'info' | 'warn' | 'error' | 'silent'`
+- **Default:** `'info'`
+- **Version:** `>= 1.4.0`
+
+Specify the log level of Rsbuild, the default value is `info`.
+
+## Example
+
+Set `logLevel` to `warn` and Rsbuild will only output `warn` and `error` level logs:
+
+```ts title="rsbuild.config.ts"
+export default {
+  logLevel: 'warn',
+};
+```
+
+Set `logLevel` to `error` and Rsbuild will only output `error` level logs:
+
+```ts title="rsbuild.config.ts"
+export default {
+  logLevel: 'error',
+};
+```
+
+## Optional values
+
+- `info`: Output all logs
+- `warn`: Output `warn` and `error` level logs
+- `error`: Output `error` level logs
+- `silent`: Do not output any logs
+
+## Limitations
+
+Currently, you cannot set different log levels for each Rsbuild instance, because Rsbuild has a global shared [logger](/api/javascript-api/core#logger) instance, and all Rsbuild instances will share this logger instance.

website/docs/en/guide/migration/vite.mdx

@@ -113,6 +113,7 @@ Here is the corresponding Rsbuild configuration for Vite configuration:
 | plugins                               | [plugins](/config/plugins)                                       |
 | appType                               | [server.historyApiFallback](/config/server/history-api-fallback) |
 | envDir                                | [Env directory](/guide/advanced/env-vars#env-directory)          |
+| logLevel                              | [logLevel](/config/log-level)                                    |
 | cacheDir                              | [buildCache](/config/performance/build-cache)                    |
 | publicDir                             | [server.publicDir](/config/server/public-dir)                    |
 | assetsInclude                         | [source.assetsInclude](/config/source/assets-include)            |

website/docs/zh/config/log-level.mdx

@@ -0,0 +1,36 @@
+# logLevel
+
+- **类型：** `'info' | 'warn' | 'error' | 'silent'`
+- **默认值：** `'info'`
+- **版本：** `>= 1.4.0`
+
+指定 Rsbuild 的日志级别，默认值为 `info`。
+
+## 示例
+
+将 `logLevel` 配置为 `warn` 后，Rsbuild 只会输出 `warn` 和 `error` 级别的日志：
+
+```ts title="rsbuild.config.ts"
+export default {
+  logLevel: 'warn',
+};
+```
+
+将 `logLevel` 配置为 `error` 后，Rsbuild 只会输出 `error` 级别的日志：
+
+```ts title="rsbuild.config.ts"
+export default {
+  logLevel: 'error',
+};
+```
+
+## 可选值
+
+- `info`：输出所有日志
+- `warn`：输出 `warn` 和 `error` 级别的日志
+- `error`：输出 `error` 级别的日志
+- `silent`：不输出任何日志
+
+## 局限性
+
+目前你无法为每一个 Rsbuild 实例设置不同的日志级别，因为 Rsbuild 内部有一个全局共享的 [logger](/api/javascript-api/core#logger) 实例，所有 Rsbuild 实例都会共享这个 logger 实例。

website/docs/zh/guide/migration/vite.mdx

@@ -113,6 +113,7 @@ Rsbuild 会在构建时自动注入 `<script>` 标签到生成的 HTML 文件中
 | appType                               | [server.historyApiFallback](/config/server/history-api-fallback) |
 | plugins                               | [plugins](/config/plugins)                                       |
 | envDir                                | [Env Directory](/guide/advanced/env-vars#env-目录)               |
+| logLevel                              | [logLevel](/config/log-level)                                    |
 | cacheDir                              | [buildCache](/config/performance/build-cache)                    |
 | publicDir                             | [server.publicDir](/config/server/public-dir)                    |
 | assetsInclude                         | [source.assetsInclude](/config/source/assets-include)            |

website/theme/rsbuildPluginOverview.ts

@@ -30,6 +30,10 @@ export const rsbuildPluginOverview: RsbuildPlugin = {
             text: 'plugins',
             link: '/config/plugins',
           },
+          {
+            text: 'logLevel',
+            link: '/config/log-level',
+          },
           {
             text: 'environments',
             link: '/config/environments',