[Keyboard] Update bm40hsrgb with RGB Matrix support (#10044)

* bm40rgb: copy from kbfirmware.com

* bm40rgb: align default keymap

* bm40rgb: rename kb.c/h to bm40rgb.c/h

* bm40rgb: adjust with changes from the noroadsleft converter

* bm40rgb: adjust keyboard to support plant_mit and ortho_4x12 layouts

* bm40rgb: Add keyboard readme.md

* bm40rgb: add RGB Matrix support

* bm40rgb: remove bm40hsrgb layout

* Apply suggestions from PR

- Fix alignment in keyboards/bm40rgb/bm40rgb.c
- Remove redundant DESCRIPTION in keyboards/bm40rgb/config.h
- Tidy keyboards/bm40rgb/readme.md
- Tidy MANUFACTURER, PRODUCT in keyboards/bm40rgb/config.h
- Tidy rules.mk keyboards/bm40rgb/rules.mk
- Use PRODUCT_ID computed from SHASUM of keyboard name in keyboards/bm40rgb/config.h
- Define LAYOUT_all in keyboards/bm40rgb/bm40rgb.h

* Update keyboards/bm40rgb/info.json

* Tidy comment

* Apply suggestions from code review

* Apply suggestions from code review

* Revert "bm40rgb: remove bm40hsrgb layout"

This reverts commit 1f69a03551321bf8cf736150f1f651127c90585a.

* Move the rgbmatrix change over to bm40hsrgb

* Wrap g_led_config declaration with

keyboards/bm40hsrgb/readme.md

@@ -1,11 +1,12 @@
 # bm40hsrgb
 
-A 40% mechanical keyboard.
+![BM40 RGB](https://rgoulter.com/images/keyboards/bm40rgb/bm40rgb_large.jpg)
+
+An ortholinear 40% hotswap keyboard with per-key RGB in-switch LEDs and RGB Backlighting, from KP Republic.
 
 This firmware was originally taken from a kbfirmware.json and manually converted. You may find the original `.json` files [here](https://drive.google.com/drive/folders/1tlTHQIFcluK2mjZ4UbbKCsdRLgSRSPw6).
 
-
-* Keyboard Maintainer: [tominabox1](https://github.com/tominabox1)
+* Keyboard Maintainer: [rgoulter](https://github.com/rgoulter)
 * Hardware Supported: bm40hsrgb PCB
 * Hardware Availability: [KPRepublic](https://www.aliexpress.com/item/4001147779116.html)