refactor: move typemap.go to maputil package and add document for it

README.md

@@ -598,6 +598,8 @@ import "github.com/duke-git/lancet/v2/maputil"
 
 #### Function list:
 
+-   **<big>MapTo</big>** : quick map any value to struct or any base type.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#MapTo)]
 -   **<big>ForEach</big>** : executes iteratee funcation for every key and value pair in map.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/maputil.md#ForEach)]
     [[play](https://go.dev/play/p/OaThj6iNVXK)]
@@ -1340,51 +1342,6 @@ import "github.com/duke-git/lancet/v2/xerror"
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/xerror.md#TryUnwrap)]
     [[play](https://go.dev/play/p/acyZVkNZEeW)]
 
-### 22. quick map any to struct or any base type
-```go
-import "github.com/duke-git/lancet/v2/typemap"
-```
-#### Example
-```go
-type (
-	Person struct {
-		Name  string  `json:"name"`
-		Age   int     `json:"age"`
-		Phone string  `json:"phone"`
-		Addr  Address `json:"address"`
-	}
-
-	Address struct {
-		Street string `json:"street"`
-		Number int    `json:"number"`
-	}
-)
-
-func main() {
-    v := map[string]interface{}{
-        "person":map[string]interface{}{
-            "name":"Nothin",
-            "age":123,
-            "phone":"123421312",
-            "address":map[string]interface{}{
-                "street":"test",
-                "number":1,
-            },
-        },
-        "other":1234,
-    }
-
-    var person Person
-    err :=typemap.MapTo(v["person"],&person)
-    if err != nil {
-        //error handler ...
-    }
-
-    log.Println(person)
-}
-
-
-```
 
 
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