Issue 10 ci add support for code spelling checks (#231)

* added make targets spell and codespell for spelling checks

* fix spelling errors detected by codespell

* added codespell to github workflow

Co-authored-by: Steve Karg <skarg@users.sourceforge.net>

src/bacnet/basic/service/h_getevent.c

@@ -169,7 +169,7 @@ void handler_get_event_information(uint8_t *service_request,
                         (apdu_len >= MAX_APDU - 2)) {
                         /* Device must be able to fit minimum
                            one event information.
-                           Length of one event informations needs
+                           Length of one event information needs
                            more than 50 octets. */
                         if ((service_data->max_resp < 128) ||
                             (MAX_APDU < 128)) {

src/bacnet/basic/service/h_rp.c

@@ -157,7 +157,7 @@ void handler_read_property(uint8_t *service_request,
                 if (apdu_len > service_data->max_resp) {
                     /* too big for the sender - send an abort!
                        Setting of error code needed here as read property
-                       processing may have overriden the default set at start */
+                       processing may have overridden the default set at start */
                     rpdata.error_code =
                         ERROR_CODE_ABORT_SEGMENTATION_NOT_SUPPORTED;
                     len = BACNET_STATUS_ABORT;

src/bacnet/basic/service/h_rr.c

@@ -116,7 +116,7 @@ static int Encode_RR_payload(uint8_t *apdu, BACNET_READ_RANGE_DATA *pRequest)
  *
  *  @param service_request  Pointer to the service request.
  *  @param service_len  Bytes valid in the service request.
- *  @param src  Pointer to the BACnet addresss.
+ *  @param src  Pointer to the BACnet address.
  *  @param service_data  Pointer to the service data,
  *                       taken from the request.
  */