docs: add reference documents for the file.read_env function

docs/reference/model/file.md

@@ -65,3 +65,9 @@ Copy a file or directory from the source path to the destination path.
 `mv(src: str, dest: str)`
 
 Move a file or directory from the source path to the destination path.
+
+## read_env
+
+`read_env(key: str) -> str`
+
+Read the environment variable `key` from the current process.

i18n/zh-CN/docusaurus-plugin-content-docs/current/reference/model/file.md

@@ -77,3 +77,9 @@ weight: 100
 `write(filepath: str, content: str)`
 
 将内容写入指定路径的文件。如果文件不存在，将会被创建。如果文件存在，其内容将被替换。
+
+## read_env
+
+`read_env(key: str) -> str`
+
+从当前进程中读取环境变量 `key` 的值。

i18n/zh-CN/docusaurus-plugin-content-docs/version-0.9/reference/model/file.md

@@ -77,3 +77,9 @@ weight: 100
 `write(filepath: str, content: str)`
 
 将内容写入指定路径的文件。如果文件不存在，将会被创建。如果文件存在，其内容将被替换。
+
+## read_env
+
+`read_env(key: str) -> str`
+
+从当前进程中读取环境变量 `key` 的值。

package.json

@@ -1,6 +1,6 @@
 {
   "name": "kcl-website",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "private": true,
   "scripts": {
     "docusaurus": "docusaurus",

versioned_docs/version-0.9/reference/model/file.md

@@ -65,3 +65,9 @@ Copy a file or directory from the source path to the destination path.
 `mv(src: str, dest: str)`
 
 Move a file or directory from the source path to the destination path.
+
+## read_env
+
+`read_env(key: str) -> str`
+
+Read the environment variable `key` from the current process.