feat: init basic arch code completion builder

unit-core/src/main/kotlin/cc/unitmesh/core/arch/LayeredArchitecture.kt

@@ -0,0 +1,33 @@
+package cc.unitmesh.core.arch
+
+/**
+ *
+ */
+interface LayeredArchitecture {
+    val layerDefinitions: LayerDefinitions
+}
+
+data class LayerDefinition(
+    val name: String,
+    val optional: Boolean = false,
+)
+
+class LayerDefinitions {
+    private val layerDefinitions: MutableMap<String, LayerDefinition> = LinkedHashMap()
+
+    fun add(definition: LayerDefinition) {
+        layerDefinitions[definition.name] = definition
+    }
+
+    fun containLayer(layerName: String): Boolean {
+        return layerDefinitions.containsKey(layerName)
+    }
+
+    private fun get(layerNames: Collection<String>): List<LayerDefinition> {
+        return layerNames.mapNotNull(layerDefinitions::get)
+    }
+
+    operator fun iterator(): Iterator<LayerDefinition> {
+        return layerDefinitions.values.iterator()
+    }
+}

unit-core/src/main/kotlin/cc/unitmesh/core/prompts/CodeCompletionBuilder.kt

@@ -0,0 +1,9 @@
+package cc.unitmesh.core.prompts
+
+import cc.unitmesh.core.ContextBuilder
+
+class CodeCompletionBuilder: ContextBuilder {
+    override fun build(): String {
+        TODO("Not yet implemented")
+    }
+}