Add Mechstudio/Chapter1

[casuanoob]

Description

Add support for Chapter 1 by Rooke Design.

This is an exploded 65% design with an encoder in the top right. Solder and hotswap variants are handled on the same firmware.

I've also moved mechstudio/dawn.json to mechstudio/dawn/dawn.json for neatness. Not sure if the convention is to have a subdirectory for each keyboard or if the defintions can just all sit in the vendor directory.

QMK Pull Request

PR merged: #23452

Checklist

• The VIA support for this keyboard is MERGED in QMK master already (MANDATORY)
• The VIA definition follows the guide here: https://caniusevia.com/docs/layouts
• I have a V3 JSON version for this keyboard definition.(MANDATORY)
• I have tested this keyboard definition using VIA's "Design" tab.
• I have tested this keyboard definition with firmware on a device.
• I have assigned alpha keys and modifier keys with the correct colors.
• The Vendor ID is not 0xFEED

[Cipulot]

@casuanoob thanks for the PR. The move you performed by having separate keyboard folders under the vendor name is the type of formatting we will apply from now on. It's mainly for those boards that have a lot of sub versions but, for consistency, the scheme should be followed by a 1 version board too.
Thanks for applying the change directly yourself 👍