Added BuildTwitch.kt (not functional yet)

src/main/kotlin/ley/anvil/modpacktools/commands/BuildTwitch.kt

@@ -0,0 +1,43 @@
+package ley.anvil.modpacktools.commands
+
+import ley.anvil.modpacktools.MPJH
+import ley.anvil.modpacktools.command.CommandReturn
+import ley.anvil.modpacktools.command.CommandReturn.Companion.success
+import ley.anvil.modpacktools.command.ICommand
+import ley.anvil.modpacktools.command.LoadCommand
+import ley.anvil.modpacktools.util.convertAStoManifest
+import ley.anvil.modpacktools.util.zipDir
+import java.io.File
+import java.io.FileOutputStream
+import java.io.FileWriter
+import java.util.zip.ZipOutputStream
+
+@LoadCommand
+object BuildTwitch : ICommand {
+    override fun execute(args: Array<out String>): CommandReturn {
+        val wr = MPJH.asWrapper!!
+        val ml = convertAStoManifest(wr)
+        val archiveName = wr.json.id + "-" + wr.defaultVersion.versionName + "-twitch"
+        val dir = File("./build")
+        val tmp = File("./.mpt/twitch")
+        dir.mkdirs()
+        tmp.mkdirs()
+
+        val writer = FileWriter(tmp.path + "/manifest.json")
+        ml.manifest?.write(writer)
+        writer.close()
+
+        //TODO download & install files
+
+
+        val zip = ZipOutputStream( FileOutputStream(dir.path + "/$archiveName.zip"))
+        zipDir(tmp, "", zip)
+        zip.flush()
+        zip.close()
+        return success()
+    }
+
+    override val name: String = "buildTwitch"
+
+
+}