add forgeJo publishing repo

gradle/publish/forgejo.gradle

@@ -0,0 +1,17 @@
+
+if (project.hasProperty("forgeJoToken")) {
+    publishing {
+        repositories {
+            maven {
+                url 'https://xbib.org/api/packages/xbib/maven'
+                authentication {
+                    basic(BasicAuthentication)
+                }
+                credentials(HttpHeaderCredentials) {
+                    name = "Authorization"
+                    value = "token {forgeJoToken}"
+                }
+            }
+        }
+    }
+}