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

keyboards/bpiphany/pegasushoof/readme.md

@@ -0,0 +1,13 @@
+# Pegasus Hoof Controller
+
+A replacement controller that turns your Filco Majestouch 87/88 mechanical keyboard into a fully programmable keyboard.
+
+Keyboard Maintainer: QMK Community  
+Hardware Supported: Pegasus Hoof  
+Hardware Availability: [1upkeyboards](https://www.1upkeyboards.com/shop/controllers/filco-pegasus-hoof-controller/)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make bpiphany/pegasus_hoof:default
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).