feat(server): support nested actions (#1356)

Part of #1318.

Author: krzema12

.github/workflows/test-script-consuming-jit-bindings.main.do-not-compile.kts

@@ -3,7 +3,15 @@
 @file:DependsOn("io.github.typesafegithub:github-workflows-kt:1.13.0")
 
 @file:Repository("http://localhost:8080/binding/")
+
+// Regular, top-level action.
 @file:DependsOn("actions:checkout:v4")
 
+// Nested action.
+@file:DependsOn("gradle:actions__setup-gradle:v3")
+
 import io.github.typesafegithub.workflows.actions.actions.Checkout
+import io.github.typesafegithub.workflows.actions.gradle.ActionsSetupGradle
+
 println(Checkout())
+println(ActionsSetupGradle())

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

@@ -21,7 +21,7 @@ data class JarArtifact(val data: ByteArray) : Artifact {
 
 fun ActionCoords.buildVersionArtifacts(): Map<String, Artifact> =
     mapOf(
-        "$name-$version.jar" to JarArtifact(buildJar(owner = owner, name = name, version = version)),
-        "$name-$version.pom" to TextArtifact(buildPomFile(owner = owner, name = name, version = version)),
-        "$name-$version.module" to TextArtifact(buildModuleFile(owner = owner, name = name, version = version)),
+        "$name-$version.jar" to JarArtifact(buildJar(owner = owner, name = name.replace("__", "/"), version = version)),
+        "$name-$version.pom" to TextArtifact(buildPomFile(owner = owner, name = name.replace("__", "/"), version = version)),
+        "$name-$version.module" to TextArtifact(buildModuleFile(owner = owner, name = name.replace("__", "/"), version = version)),
     )