Add “Schoolface” watch face for class time countdown

[kbc-yam]

This PR adds a new watch face called Schoolface, designed for teachers to count down class time.
Supports up to 12 class periods (default schedule is based on my school).
Schedules are saved using the Sensor Watch Pro file system (persist even if the battery is removed).
Works on both Classic LCD and Custom LCD (with more detailed schedule names on Custom LCD).

Alarm function notifies when half of the class time has passed.
Includes schedule editing mode with simple button controls.
I hope this will be useful for teachers around the world!

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School face

“School face” is a feature created for teachers around the world, designed to count down class time.
Thanks to the Sensor Watch Pro’s file system, any schedules you create are saved and remain intact even if the battery is removed.
With the Custom LCD, you can display schedule names in more detail (it also works properly with the Classic LCD).

About the Schedule

By default, it includes the class schedule from my school:
#1 9:20–10:50
#2 11:00–12:30
#3 13:20–14:50
#4 15:00–16:30
#5 16:30–18:00 (disabled at startup)

You can register up to 12 class periods. (The maximum number can be freely changed by modifying the source code.)

Button Guide (Normal Mode)

LIGHT (long press) → Enter the schedule editing screen.
ALARM (press) → Show the current time.
ALARM (long press) → Toggle the alarm function on/off.
(The alarm notifies you when half of the class time has passed.)

Button Guide (Schedule Editing Mode)

LIGHT → Move to the next character.
ALARM (press) → Input the current character.
ALARM (long press) → Enable/disable the selected schedule.

[kusmi]

Very cool idea!

[kbc-yam]

I filmed a video on how to use it.
I think it's a useful app for teachers and students.

I couldn't use the feature to automatically convert YouTube's audio to English, so it ended up in Japanese. I'm sorry.
I think the transcription translation is useful, so if you're interested in SchoolFace, please check out the video.

https://youtu.be/xb_978MWdBA?si=Kmwjuniby-YvexNn