added packer module

prometeu-packer/src/main/java/p/packer/api/building/PackerBuildRequest.java

@@ -0,0 +1,14 @@
+package p.packer.api.building;
+
+import p.packer.api.PackerProjectContext;
+
+import java.util.Objects;
+
+public record PackerBuildRequest(
+        PackerProjectContext project,
+        boolean incremental) {
+
+    public PackerBuildRequest {
+        Objects.requireNonNull(project, "project");
+    }
+}

prometeu-packer/src/main/java/p/packer/api/building/PackerBuildResult.java

@@ -0,0 +1,28 @@
+package p.packer.api.building;
+
+import p.packer.api.PackerOperationStatus;
+import p.packer.api.diagnostics.PackerDiagnostic;
+
+import java.nio.file.Path;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+
+public record PackerBuildResult(
+        PackerOperationStatus status,
+        String summary,
+        Path assetsArchive,
+        Map<String, Path> companionArtifacts,
+        List<PackerDiagnostic> diagnostics) {
+
+    public PackerBuildResult {
+        Objects.requireNonNull(status, "status");
+        summary = Objects.requireNonNull(summary, "summary").trim();
+        assetsArchive = Objects.requireNonNull(assetsArchive, "assetsArchive").toAbsolutePath().normalize();
+        companionArtifacts = Map.copyOf(Objects.requireNonNull(companionArtifacts, "companionArtifacts"));
+        diagnostics = List.copyOf(Objects.requireNonNull(diagnostics, "diagnostics"));
+        if (summary.isBlank()) {
+            throw new IllegalArgumentException("summary must not be blank");
+        }
+    }
+}

prometeu-packer/src/main/java/p/packer/api/building/PackerBuildService.java

@@ -0,0 +1,9 @@
+package p.packer.api.building;
+
+import p.packer.api.PackerOperationClass;
+
+public interface PackerBuildService {
+    PackerOperationClass operationClass();
+
+    PackerBuildResult build(PackerBuildRequest request);
+}