adding micropython examples (#2286)

* adding micropython examples

* adding micropython examples

examples/widgets/win/lv_example_win_1.py

@@ -0,0 +1,36 @@
+def event_handler(e):
+    code = e.get_code()
+    obj = lv.obj.__cast__(e.get_target())
+    if code == lv.EVENT.CLICKED:
+        print("Button {:d} clicked".format(obj.get_child_id()))
+
+win = lv.win(lv.scr_act(), 60)
+btn1 = win.add_btn(lv.SYMBOL.LEFT, 40)
+btn1.add_event_cb(event_handler,lv.EVENT.ALL, None)
+win.add_title("A title")
+btn2=win.add_btn(lv.SYMBOL.RIGHT, 40)
+btn2.add_event_cb(event_handler,lv.EVENT.ALL, None)
+btn3 = win.add_btn(lv.SYMBOL.CLOSE, 60)
+btn3.add_event_cb(event_handler,lv.EVENT.ALL, None)
+
+cont = win.get_content()  #Content can be aded here
+label =  lv.label(cont)
+label.set_text("""This is
+a pretty
+long text
+to see how
+the window
+becomes
+scrollable.
+
+
+We need
+quite some text
+and we will 
+even put
+some more
+text to be
+sure it
+overflows.
+""")
+