Add big_clock v1.2

[Eris-Margeta]

Big Clock v1.2

Full-screen digital bedside/tableside clock with adjustable brightness for Flipper Zero.

Features

• Large 24x48 pixel custom digits visible from across the room
• Adjustable brightness (0-100% in 10% increments)
• 0% brightness option (screen off while clock runs)
• Visual brightness indicator with progress bar
• Always-on backlight mode

What's New in v1.2

• Flicker-free brightness control using NightStand Clock approach
• Improved brightness restoration on app exit

Tested Firmware

• Official Flipper Firmware 1.43 ✅
• Momentum mntm-012 ✅

Source: https://github.com/Eris-Margeta/flipper-apps/tree/main/apps/big-clock

[xMasterX]

Hi, your README.md file in your repo is not compatible with catalog
Markdown error: Markdown element 'Header Depth' max level 2 exceeded

You need to correct headers ### to be # and ##

After that update commit sha here in manifest yml to point to your latest commit

[Eris-Margeta]

I'm not sure if your CI failure is related to my monorepo readme file or my individual app's readme file. I updated my individual app's readme file to be compliant with your two level headlines for markdown.

I also have updated v to 1.3 since I've found a pretty tricky bug which I fixed.

[Eris-Margeta]

OK I just updated all level 3 headings in the changelogs as well so this should pass.