tidbit: update to use encoder map

[jaygreco]

Description

Update the TIDBIT definition to include encoder map support. Created a new PR instead of reopening #1521 after QMK removed encoder map hacks in the latest breaking changes merge.

QMK Pull Request

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