feat(bytecode): add chunk container

src/main/kotlin/lumen/bytecode/Chunk.kt

@@ -0,0 +1,28 @@
+package lumen.bytecode
+
+import lumen.runtime.Value
+
+class Chunk {
+    val code = mutableListOf<Int>()
+    val lines = mutableListOf<Int>()
+    val columns = mutableListOf<Int>()
+    val constants = mutableListOf<Value>()
+
+    fun emit(byte: Int, line: Int, column: Int): Int {
+        code.add(byte)
+        lines.add(line)
+        columns.add(column)
+        return code.size - 1
+    }
+
+    fun emit(op: Opcode, line: Int, column: Int): Int = emit(op.ordinal, line, column)
+
+    fun addConstant(value: Value): Int {
+        constants.add(value)
+        return constants.size - 1
+    }
+
+    fun patch(offset: Int, value: Int) {
+        code[offset] = value
+    }
+}