Keyboard: Bpiphany Pegasus Hoof Refactor, Configurator support (#4649)
* Pegasus Hoof: layout macro refactor
- Renamed KEYMAP to LAYOUT
- Added LAYOUT_tkl_ansi macro
- white space changes (changed tabs for 2 spaces)
* Pegasus Hoof: keymap refactor
- updated layout macro names
- changed to #include QMK_KEYBOARD_H
- removed redundant KC_TRNS definitions
- white space changes (changed tabs to spaces)
- removed deprecated build script instructions from rules.mk files
- updated config.h to #pragma once
* Pegasus Hoof: Configurator support
* Pegasus Hoof: readme cleanup
- Reformat header and description paragraph
- Fix Hardware Availability link (was 404)
- renamed filename to lowercase
* Pegasus Hoof: add LAYOUTS = tkl_ansi to rules.mk
* Pegasus Hoof: fix LAYOUT_tkl_jis macro
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