fix(buildSrc): add missing hasType extension function

This checks if there's an extension of the specified type

buildSrc/src/main/kotlin/io/github/edricchan03/plugin/library/Utils.kt

@@ -2,7 +2,9 @@ package io.github.edricchan03.plugin.library
 
 import io.github.edricchan03.plugin.library.extensions.LibraryPluginExtension
 import org.gradle.api.Project
+import org.gradle.api.plugins.ExtensionContainer
 import org.gradle.api.publish.maven.MavenPom
+import org.gradle.kotlin.dsl.findByType
 import org.gradle.util.Path as GradleProjectPath
 
 internal val Project.pathAsFilePath
@@ -64,6 +66,8 @@ fun MavenPom.setConventions(project: Project, extension: LibraryPluginExtension)
     }
 }
 
+internal inline fun <reified T : Any> ExtensionContainer.hasType() = findByType<T>() != null
+
 /** The GitHub repository for the project. */
 const val SOURCE_URL = "https://github.com/EdricChan03/androidx-ktx-extras"