Add SIRIND's Tomak79H

[eerraa]

Add SIRIND's Tomak79H

Description

This is the Hotswap PCB for SIRIND's Tomak.
Please allow me to add this to the VIA.

QMK Pull Request

qmk/qmk_firmware#24505

Checklist

• The VIA support for this keyboard is MERGED in QMK master already (MANDATORY)
• I have tested this keyboard definition with firmware on a device.(MANDATORY)
• VIA keymap uses custom menus
• The Vendor ID is not 0xFEED

[Cipulot]

@eerraa if the custom UI elements code is shared for this board and #43 I suggest making a common file to be included to avoid code duplication.
Something like keyboards/era/sirind/common/tomak_custom_ui.c and keyboards/era/sirind/common/tomak_custom_ui.h for header inclusions.

I saw that similar code is used in #44 but not all code is shared, so later if for that board you have common code as well, that one can be something like keyboards/era/sirind/common/brick_custom_ui.c and keyboards/era/sirind/common/brick_custom_ui.h

[eerraa]

@Cipulot
As you suggested, I have created a common file for the Custom UI.
This is because Tomak79H and Tomak79S share Custom UI code.
Thank you for your assistance.