Add hints to pick a local NTP server, geographic and behind a NAT: examples/clock.py

[niftyhacking]

Consider adding hints to pick a local NTP server, geographic and behind a NAT in examples/clock.py

Also:
a) Is it silly to wrap the Thonny bit in a conditional. I could not sync until I commented it out. Did Thonny change?
Does this argue with rshell use?
b) Since there are multiple fonts in examples/fonts.py hint that there are more.

% diff Current-Git-clock.py ./clock.py
16c16,24
< if display.isconnected():

    if display.isconnected(): 
        print("default NTP host is: ",ntptime.host)
        # Uncomment or edit for a 
        # local choice see https://www.ntppool.org/
        #ntptime.host = 'pool.ntp.org'
        #ntptime.host = 'server 1.north-america.pool.ntp.org'
        #ntptime.host = '2.north-america.pool.ntp.org'
        ntptime.host = '10.0.4.94'  #local behind NAT
        print("new and current NTP host is: ",ntptime.host)

22,25c30,33
< try:
< badger2040.pcf_to_pico_rtc()
< except RuntimeError:
< pass

#try:

badger2040.pcf_to_pico_rtc()

#except RuntimeError:

pass

29c37,38
< display.set_font("gothic")

#display.set_font("gothic")
display.set_font("serif")

[niftyhacking]

Minor changes after updating to and testing the recent update
"MicroPython 856e08b-dirty on 2023-07-21; Pimoroni Badger2040W 2MB with RP2040"
I wanted a way to show local time so added bit from "guyd" https://forum.micropython.org/viewtopic.php?t=5145
Thank you, all is working nicely for me.

`% diff Current-Git-clock.py clock.py
16a17,25

        print("default NTP host is: ",ntptime.host)
        # Uncomment or edit one of the below
        # if default is not desired set a local choice
        # local choice see https://www.ntppool.org/
        #ntptime.host = 'pool.ntp.org'
        #ntptime.host = 'server 1.north-america.pool.ntp.org'
        #ntptime.host = '2.north-america.pool.ntp.org'
        ntptime.host = '10.0.4.94'  #local behind NAT
        print("new and current NTP host is: ",ntptime.host)

22,25c31,34
< try:
< badger2040.pcf_to_pico_rtc()
< except RuntimeError:
< pass

#try:

badger2040.pcf_to_pico_rtc()

#except RuntimeError:

pass

29c38,39
< display.set_font("gothic")

#display.set_font("gothic")
display.set_font("serif")
187a198,203
import utime
utc_shift = -7 # edit for local TZ offset.
tm = utime.localtime(utime.mktime(utime.localtime()) + utc_shift*3600)
tm = tm[0:3] + (0,) + tm[3:6] + (0,)
rtc.datetime(tm)

`