[Keyboard] KBDfans Bella RGB ANSI and Bella RGB ISO (#11438)

* add bella rgb keyboards

* Update rgb_iso.c

* fix error

* Update rgb_iso.h

* Update keyboards/kbdfans/bella/rgb/rules.mk

* Update keyboards/kbdfans/bella/rgb_iso/rules.mk

* Update keymap.c

* Update keyboards/kbdfans/bella/rgb/info.json

* Update keyboards/kbdfans/bella/rgb_iso/info.json

* Update keyboards/kbdfans/bella/rgb_iso/config.h

* Update keyboards/kbdfans/bella/rgb/config.h

* Update keyboards/kbdfans/bella/rgb_iso/rules.mk

* Update keyboards/kbdfans/bella/rgb_iso/rules.mk

* Update keyboards/kbdfans/bella/rgb_iso/rules.mk

* Update keyboards/kbdfans/bella/rgb/rules.mk

* Update keyboards/kbdfans/bella/rgb/rules.mk

* Update keyboards/kbdfans/bella/rgb/rules.mk

* Update rgb_iso.c

* Update rgb.c

* Update rgb_iso.c

* Update rgb_iso.h

* Update keyboards/kbdfans/bella/rgb/config.h

* Update keyboards/kbdfans/bella/rgb/rgb.h

* Update keyboards/kbdfans/bella/rgb/info.json

* Update keyboards/kbdfans/bella/rgb/info.json

* Update keyboards/kbdfans/bella/rgb/keymaps/default/keymap.c

* Update keyboards/kbdfans/bella/rgb_iso/keymaps/via/keymap.c

* Update keyboards/kbdfans/bella/rgb_iso/keymaps/via/keymap.c

* Update keyboards/kbdfans/bella/rgb_iso/readme.md

* Update keyboards/kbdfans/bella/rgb_iso/readme.md

* Update keyboards/kbdfans/bella/rgb_iso/readme.md

* Apply suggestions from code review

kbdfans/bella/rgb: Change remaining instances of LAYOUT_all to LAYOUT

* Apply suggestions from code review

kbdfans/bella/rgb: update readme

- update keyboard name
- include flashing and bootloader instructions

* Apply suggestions from code review

kbdfans/bella/rgb_iso: update keyboard name

Changes remaining instances of "BELLA_RGB_ISO" to "BELLA RGB ISO".

* Apply suggestions from code review

kbdfans/bella/rgb_iso: Change LAYOUT_all to LAYOUT

* Apply suggestions from code review

kbdfans/bella/rgb_iso: Move ISO Enter's keycode to home row per QMK standard

keyboards/kbdfans/bella/rgb_iso/readme.md

@@ -0,0 +1,19 @@
+# BELLA RGB ISO (Hotswap)
+
+* Keyboard Maintainer: [DZTECH](https://github.com/moyi4681)
+* Hardware Supported: BELLA RGB ISO (ATmega32U4)
+* Hardware Availability: [KBDFans](https://kbdfans.cn/)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make kbdfans/bella/rgb_iso:default
+
+Flashing example for this keyboard:
+
+    make kbdfans/bella/rgb_iso:default:flash
+
+## Accessing Bootloader Mode
+
+To reset the board into bootloader mode, hold the key at the top left of the keyboard while connecting the USB cable (also erases persistent settings).
+
+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).