Add cat

Closes #5

bin/cat.py

@@ -0,0 +1,20 @@
+import os
+import console
+
+def get_app_class(template):
+    class App(template):
+        def F_main(self):
+            for file in self.argv[1:]:
+                try:
+                    with open(file, "rb") as f:
+                        self.console.write(f.read())
+                except OSError as e:
+                    try:
+                        os.listdir(file)
+                        console.write_str(self.console, f"cat: {path}: Is a directory\n")
+                    except OSError:
+                        console.write_str(self.console, f"cat: {path}: No such file or directory\n")
+
+            self.exit()
+
+    return App