docs: update docs

Author: jooy2

docs/src/en/reference/crypto/encodeBase64.md

@@ -14,6 +14,14 @@ Base64-encode the given string.
 
 ## Examples
 
-```javascript
+::: code-group
+
+```javascript [JavaScript]
 encodeBase64('this is test'); // Returns 'dGhpcyBpcyB0ZXN0'
 ```
+
+```dart [Dart]
+encodeBase64('this is test'); // Returns 'dGhpcyBpcyB0ZXN0'
+```
+
+:::

docs/src/en/reference/crypto/encrypt.md

@@ -17,6 +17,14 @@ Encrypt with the algorithm of your choice (algorithm default: `aes-256-cbc`, ivS
 
 ## Examples
 
-```javascript
+::: code-group
+
+```javascript [JavaScript]
 encrypt('test', 'secret-key');
 ```
+
+```dart [Dart]
+encrypt('test', 'secret-key');
+```
+
+:::

docs/src/ko/reference/crypto/encodeBase64.md

@@ -14,6 +14,14 @@
 
 ## Examples
 
-```javascript
+::: code-group
+
+```javascript [JavaScript]
 encodeBase64('this is test'); // Returns 'dGhpcyBpcyB0ZXN0'
 ```
+
+```dart [Dart]
+encodeBase64('this is test'); // Returns 'dGhpcyBpcyB0ZXN0'
+```
+
+:::

docs/src/ko/reference/crypto/encrypt.md

@@ -17,6 +17,14 @@
 
 ## Examples
 
-```javascript
+::: code-group
+
+```javascript [JavaScript]
 encrypt('test', 'secret-key');
 ```
+
+```dart [Dart]
+encrypt('test', 'secret-key');
+```
+
+:::