Remove legacy JVM-specific file system, shell, and related implementations; migrate to platform-agnostic and common main modules.

src/commonMain/kotlin/mtmc/asm/data/Data.kt

@@ -0,0 +1,37 @@
+package mtmc.asm.data
+
+import mtmc.asm.ASMElement
+import mtmc.asm.Assembler
+import mtmc.tokenizer.MTMCToken
+
+class Data(labels: MutableList<MTMCToken>, lineNumber: Int) : ASMElement(labels, lineNumber) {
+  var valueToken: MTMCToken? = null
+  private var value: ByteArray = ByteArray(0)
+
+  override var sizeInBytes: Int
+    get() = value.size
+    set(value) {}
+
+  fun genData(dataBytes: ByteArray, assembler: Assembler) {
+    val offset = location - assembler.instructionsSizeInBytes
+    for (i in 0..<sizeInBytes) {
+      val dataByte = value[i]
+      dataBytes[offset + i] = dataByte
+    }
+  }
+
+  fun setValue(src: MTMCToken, value: ByteArray) {
+    this.valueToken = src
+    this.value = value
+  }
+
+  override fun toString(): String {
+    return "Data{" +
+        "value=" + value.contentToString() +
+        '}'
+  }
+
+  override fun addError(err: String) {
+    addError(labels.last(), err)
+  }
+}