docs: add rust api documents

docs/reference/xlang-api/rust-api.md

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+---
+sidebar_position: 7
+---
+
+# Rust API
+
+## Installation
+
+```shell
+cargo add --git https://github.com/kcl-lang/lib
+```
+
+## Quick Start
+
+```rust
+use kcl_lang::*;
+use anyhow::Result;
+
+fn main() -> Result<()> {
+    let api = API::default();
+    let args = &ExecProgramArgs {
+        k_filename_list: vec!["main.k".to_string()],
+        k_code_list: vec!["a = 1".to_string()],
+        ..Default::default()
+    };
+    let exec_result = api.exec_program(args)?;
+    println!("{}", exec_result.yaml_result);
+    Ok(())
+}
+```

i18n/zh-CN/docusaurus-plugin-content-docs/current/reference/xlang-api/rust-api.md

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+---
+sidebar_position: 7
+---
+
+# Rust API
+
+## 添加依赖
+
+```shell
+cargo add --git https://github.com/kcl-lang/lib
+```
+
+## 快速开始
+
+```rust
+use kcl_lang::*;
+use anyhow::Result;
+
+fn main() -> Result<()> {
+    let api = API::default();
+    let args = &ExecProgramArgs {
+        k_filename_list: vec!["main.k".to_string()],
+        k_code_list: vec!["a = 1".to_string()],
+        ..Default::default()
+    };
+    let exec_result = api.exec_program(args)?;
+    println!("{}", exec_result.yaml_result);
+    Ok(())
+}
+```

i18n/zh-CN/docusaurus-plugin-content-docs/version-0.8/reference/xlang-api/rust-api.md

@@ -0,0 +1,30 @@
+---
+sidebar_position: 7
+---
+
+# Rust API
+
+## 添加依赖
+
+```shell
+cargo add --git https://github.com/kcl-lang/lib
+```
+
+## 快速开始
+
+```rust
+use kcl_lang::*;
+use anyhow::Result;
+
+fn main() -> Result<()> {
+    let api = API::default();
+    let args = &ExecProgramArgs {
+        k_filename_list: vec!["main.k".to_string()],
+        k_code_list: vec!["a = 1".to_string()],
+        ..Default::default()
+    };
+    let exec_result = api.exec_program(args)?;
+    println!("{}", exec_result.yaml_result);
+    Ok(())
+}
+```

versioned_docs/version-0.8/reference/xlang-api/rust-api.md

@@ -0,0 +1,30 @@
+---
+sidebar_position: 7
+---
+
+# Rust API
+
+## Installation
+
+```shell
+cargo add --git https://github.com/kcl-lang/lib
+```
+
+## Quick Start
+
+```rust
+use kcl_lang::*;
+use anyhow::Result;
+
+fn main() -> Result<()> {
+    let api = API::default();
+    let args = &ExecProgramArgs {
+        k_filename_list: vec!["main.k".to_string()],
+        k_code_list: vec!["a = 1".to_string()],
+        ..Default::default()
+    };
+    let exec_result = api.exec_program(args)?;
+    println!("{}", exec_result.yaml_result);
+    Ok(())
+}
+```