Add shell and echo app

test-hdd/apps/tysh/index.js

@@ -0,0 +1,23 @@
+__oskrnl.console_log("> ");
+
+var input = "";
+var inputActive = true;
+
+__oskrnl.input_onKeyPress(function (key) {
+  if (!inputActive) return;
+
+  if (key == "Backspace") input = input.slice(0, -1);
+  else if (key == "Enter") {
+    inputActive = false;
+    process();
+    return;
+  } else input += key.toLowerCase();
+
+  __oskrnl.console_update("> " + input);
+});
+
+function process() {
+  var app = input.split(" ")[0];
+  var args = input.split(" ").slice(1);
+  __oskrnl.app_launcher_run(app, args.join(" "));
+}