Add validation on route EditWorkgroup

src/main/kotlin/fr/dcproject/common/validation/Url.kt

@@ -0,0 +1,15 @@
+package fr.dcproject.common.validation
+
+import io.konform.validation.ValidationBuilder
+import java.net.MalformedURLException
+import java.net.URL
+
+fun ValidationBuilder<String>.isUrl() =
+    addConstraint("is not url") {
+        try {
+            val url = URL(it)
+            true
+        } catch (e: MalformedURLException) {
+            false
+        }
+    }