Add Timer's Time Remaining to the StatusIcons bar

[vkareh]

When a timer is active the time remaining will be displayed in the StatusIcons bar along with an hour glass symbol, and will be set to hidden when the timer's off.

[vkareh]

@JustScott - I've created a new PR with your changes from #1967, but rebased from main, with fixes based on the new Timer API, and the commits squashed (but still attributed to you, of course).

Feel free to cherry-pick to your own branch and force-push, or we can use this one. Whichever you prefer.

[github-actions]

Build size and comparison to main:

Section	Size	Difference
text	383324B	544B
data	944B	0B
bss	22632B	0B

Run in InfiniEmu

[JustScott]

@vkareh I appreciate you doing this, this PR can be used instead of the one I created.

On a side note, in the future when I find some more time to tinker with this project, I'm very excited to try out all the new PRs you've been working on! They're all making this watch much more useable than I ever expected it could be!

[vkareh]

Hey @JustScott, thanks! I keep a branch at https://github.com/vkareh/InfiniTime/tree/daily-driver with the changes I use on my watch.