fix(abg): provide a checksum for maven metadata or consumers are unhappy

Author: Vampire

maven-binding-builder/src/main/kotlin/io/github/typesafegithub/workflows/mavenbinding/PackageArtifactsBuilding.kt

@@ -6,5 +6,6 @@ suspend fun ActionCoords.buildPackageArtifacts(githubToken: String): Map<String,
     val mavenMetadata = buildMavenMetadataFile(owner = owner, name = name, githubToken = githubToken)
     return mapOf(
         "maven-metadata.xml" to mavenMetadata,
+        "maven-metadata.xml.md5" to mavenMetadata.md5Checksum(),
     )
 }

maven-binding-builder/src/main/kotlin/io/github/typesafegithub/workflows/mavenbinding/VersionArtifactsBuilding.kt

@@ -29,10 +29,10 @@ fun ActionCoords.buildVersionArtifacts(): Map<String, Artifact>? {
     )
 }
 
-private fun ByteArray.md5Checksum(): String {
+internal fun ByteArray.md5Checksum(): String {
     val md5 = MessageDigest.getInstance("MD5")
     val hashBytes = md5.digest(this)
     return hashBytes.joinToString("") { "%02x".format(it) }
 }
 
-private fun String.md5Checksum(): String = this.toByteArray(charset = Charsets.UTF_8).md5Checksum()
+internal fun String.md5Checksum(): String = this.toByteArray(charset = Charsets.UTF_8).md5Checksum()