+added console spport for lyngio

+added console support to lyng/jlyng CLI
+added unicode escapes
+created tetris console sample

lyngio/src/linuxTest/kotlin/net/sergeych/lyngio/console/LinuxPosixLyngConsoleTest.kt

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package net.sergeych.lyngio.console
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertFalse
+import kotlin.test.assertTrue
+
+class LinuxPosixLyngConsoleTest {
+
+    private fun decode(vararg bytes: Int): ConsoleEvent.KeyDown {
+        var i = 1
+        return LinuxConsoleKeyDecoder.decode(bytes[0]) { _ ->
+            if (i >= bytes.size) null else bytes[i++]
+        }
+    }
+
+    @Test
+    fun decodesArrowLeft() {
+        val ev = decode(27, '['.code, 'D'.code)
+        assertEquals("ArrowLeft", ev.key)
+        assertFalse(ev.ctrl)
+    }
+
+    @Test
+    fun decodesArrowRightCtrlModifier() {
+        val ev = decode(27, '['.code, '1'.code, ';'.code, '5'.code, 'C'.code)
+        assertEquals("ArrowRight", ev.key)
+        assertTrue(ev.ctrl)
+    }
+
+    @Test
+    fun decodesEscape() {
+        val ev = decode(27)
+        assertEquals("Escape", ev.key)
+    }
+
+    @Test
+    fun decodesCtrlC() {
+        val ev = decode(3)
+        assertEquals("c", ev.key)
+        assertTrue(ev.ctrl)
+    }
+
+    @Test
+    fun decodesUppercaseShift() {
+        val ev = decode('A'.code)
+        assertEquals("A", ev.key)
+        assertTrue(ev.shift)
+    }
+}