doc: add methods to nRF_Connect_SDK_1_3 THCI

GRL test harness in version 58 requires implementation of
get_br_omr_address and get_ed_omr_address methods in THCI file
for Thread 1.3 certification tests.

Signed-off-by: Jakub Uliarczyk <jakub.uliarczyk@nordicsemi.no>

samples/openthread/cli/harness-thci-1-3/nRF_Connect_SDK_1_3.py

@@ -3720,6 +3720,38 @@ def srp_add(self, dst_addr=None,service_type = '_thread-test._udp',tcp_service_t
  cmd = 'srp client start %s' % dst_addr[0]
  self.__executeCommand(cmd)
 
+ @API
+ def get_br_omr_address(self):
+ cmd = 'br omrprefix'
+ getomr = self.__executeCommand(cmd)
+ print(getomr)
+ cmd = 'ipaddr'
+ ipaddr = self.__executeCommand(cmd)
+ print(ipaddr)
+ result = []
+ for ip in ipaddr:
+ try:
+ if (ipaddress.ip_address(unicode(ip)) in ipaddress.ip_network(unicode(getomr[0]))):
+ result.append(ip)
+ except:
+ continue
+ if not result:
+ raise ValueError("No OMR address found for the registered OMR prefix.")
+ else:
+ return result
+
+ @API
+ def get_ed_omr_address(self, br_omr_prefix):
+ cmd = 'ipaddr'
+ ipaddr = self.__executeCommand(cmd)
+ print(ipaddr)
+ full_addr = []
+ for i in ipaddr[:-1]:
+ full_addr.append(ModuleHelper.GetFullIpv6Address(i.strip()))
+ print(full_addr)
+ result = (filter(lambda x: x.startswith(''.join(br_omr_prefix)), full_addr))
+ return result
+
  def dns_query(self, service_type='_thread-test._udp'):
  """ Send unicast DNS query