Refactor build.gradle.kts to directly configure 'indra' settings

The 'indra' settings within the build.gradle.kts file has been refactored to remove usage of the 'configureIndra' function and instead directly defining the configuration within the 'indra' block. This change simplifies the build script, making it easier to read and maintain.

build.gradle.kts

@@ -59,7 +59,31 @@ allprojects {
     }
 
     indra {
-        configureIndra(this)
+        javaVersions {
+            target(17)
+            testWith(17)
+        }
+
+        github("eldoriarpg", "jackson-bukkit") {
+            ci(true)
+        }
+
+        lgpl3OrLaterLicense()
+
+        signWithKeyFromPrefixedProperties("rainbowdashlabs")
+
+        configurePublications {
+            pom {
+                developers {
+                    developer {
+                        id.set("rainbowdashlabs")
+                        name.set("Florian Fülling")
+                        email.set("[email protected]")
+                        url.set("https://github.com/rainbowdashlabs")
+                    }
+                }
+            }
+        }
     }
 
     spotless {
@@ -91,34 +115,6 @@ allprojects {
     }
 }
 
-fun configureIndra(extension: IndraExtension) {
-    extension.javaVersions {
-        target(17)
-        testWith(17)
-    }
-
-    extension.github("eldoriarpg", "jackson-bukkit") {
-        ci(true)
-    }
-
-    extension.lgpl3OrLaterLicense()
-
-    extension.signWithKeyFromPrefixedProperties("rainbowdashlabs")
-
-    extension.configurePublications {
-        pom {
-            developers {
-                developer {
-                    id.set("rainbowdashlabs")
-                    name.set("Florian Fülling")
-                    email.set("[email protected]")
-                    url.set("https://github.com/rainbowdashlabs")
-                }
-            }
-        }
-    }
-}
-
 indraSonatype {
     useAlternateSonatypeOSSHost("s01")
 }