Handwired Minorca Refactor (#7833)

* update config.h

- use #pragma once include guard
- update USB Device Descriptor strings

* update minorca.c

- remove matrix_init_kb function (same as QMK default)

* update minorca.h

- use #pragma once include guard
- update matrix identifiers

* update info.json

- update matrix identifiers
- change to four-space indent

* update rules.mk

- remote firmware size impact notes
- disable RGBLIGHT_ENABLE (no RGB config present)
- templating

* update readme.md

- templating

* update keymaps/default/rules.mk

- remove firmware size impact numbers
- templating

* update keymaps/rgb/rules.mk

- remote firmware size impact notes
- templating

* update keymaps/rgb/readme.md

- fix header

* remove keymaps/default/rules.mk

- identical to keyboard's rules.mk

* elevate Bootmagic configurations to keyboard level

* update keymaps/rgb/config.h

- use #pragma once include guard
- remove redundant config.h include

* update keymaps/rgb/rules.mk

- remove redundant rules

* update keymaps/rgb/readme.md

- change RGB function list to a table
- make wiring call-out a header

* remove keymaps/default/config.h

- it's blank now

* update minorca.h

- use four-space indent

* add Teensy 2.0 to readme

keyboards/handwired/minorca/minorca.c

@@ -1,6 +1 @@
 #include "minorca.h"
-
-void matrix_init_kb(void) {
-
-	matrix_init_user();
-}