feat: add RemoveNonPrintable

docs/strutil.md

@@ -45,6 +45,7 @@ import (
 -   [Unwrap](#Unwrap)
 -   [SplitWords](#SplitWords)
 -   [WordCount](#WordCount)
+-   [RemoveNonPrintable](#RemoveNonPrintable)
 
 <div STYLE="page-break-after: always;"></div>
 
@@ -937,4 +938,35 @@ func main() {
     // 0
     // 0
 }
+```
+
+
+### <span id="RemoveNonPrintable">RemoveNonPrintable</span>
+
+<p>Remove non-printable characters from a string.</p>
+
+<b>Signature:</b>
+
+```go
+func RemoveNonPrintable(str string) string
+```
+
+<b>Example:</b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/strutil"
+)
+
+func main() {
+    result1 := strutil.RemoveNonPrintable("hello\u00a0 \u200bworld\n")
+    result2 := strutil.RemoveNonPrintable("你好😄")
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    // Output:
+    // hello world
+    // 你好😄
+}
 ```

docs/strutil_zh-CN.md

@@ -45,6 +45,7 @@ import (
 -   [Unwrap](#Unwrap)
 -   [SplitWords](#SplitWords)
 -   [WordCount](#WordCount)
+-   [RemoveNonPrintable](#RemoveNonPrintable)
 
 <div STYLE="page-break-after: always;"></div>
 
@@ -936,4 +937,35 @@ func main() {
     // 0
     // 0
 }
+```
+
+
+### <span id="RemoveNonPrintable">RemoveNonPrintable</span>
+
+<p>删除字符串中不可打印的字符。</p>
+
+<b>函数签名:</b>
+
+```go
+func RemoveNonPrintable(str string) string
+```
+
+<b>示例:</b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/strutil"
+)
+
+func main() {
+    result1 := strutil.RemoveNonPrintable("hello\u00a0 \u200bworld\n")
+    result2 := strutil.RemoveNonPrintable("你好😄")
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    // Output:
+    // hello world
+    // 你好😄
+}
 ```