Add alarms

[domneedham]

RTC can have 2 alarms so be able to implement those.

Make own app as doesn't fit into settings:

• Allow user to select alarm 1 or alarm 2 like app switcher
• Show day of week via icons and text in display after setting the time

Other notes:

• Use Alarm On icon if alarms are set
• Only ring alarms in clock app

[domneedham]

Going to implement the alarm functionality, I realised the hardware alarms on the RTC are insufficient. Therefore, #12 must come first and alarms can be saved in there.

[batonac]

still planning on this?

[domneedham]

@batonac sorry I won't be, I will be archiving this repository as my clock broke ..