Port of the rotary module to ESP32 (#3625)

* Ported rotary driver. Compiles but not tested.

* Added the rotary switch driver to the esp32 version

* Review comments. Also ensure that we have GPIO if we have ROTARY.

* Allow use of GPIO 0

* Another bad piece of documentation

* Fix docs and also free the timer

* Now adds a self reference to prevent GC until after close has been called and
any queued messages have been flushed.

* Simplified the code a bit

components/modules/CMakeLists.txt

@@ -30,6 +30,8 @@ set(module_srcs
   "otaupgrade.c"
   "ow.c"
   "pipe.c"
+  "rotary_driver.c"
+  "rotary.c"
   "rmt.c"
   "rtcmem.c"
   "qrcodegen.c"

components/modules/Kconfig

@@ -232,6 +232,13 @@ menu "NodeMCU modules"
             Includes the rmt module to use the ESP32's built-in 
             remote control hardware.
 
+    config NODEMCU_CMODULE_ROTARY
+        bool "Rotary switch input device"
+        default "n"
+        select NODEMCU_CMODULE_GPIO
+        help
+            Includes the rotary module which allows easy access to one or more rotary switches.
+
     config NODEMCU_CMODULE_RTCMEM
         bool "Access to a limited amount of battery backed memory (rtcmem)"
         default "n"