[Keyboard] Consolidate Binepad BN009 R1 and R2 (#20113)

keyboards/binepad/bn009/readme.md

@@ -4,14 +4,35 @@
 
 A 9% macropad.
 
-* Keyboard Maintainer: [BINEPAD]
-* Hardware Supported: BN009 PCB (ATmega32U4)
-* Hardware Availability: [Interest Check](https://www.binepad.com/bn009)
-
-**Physical reset button**: There's a small hole at the bottom of macropad. Use the reset pin provided in box and push it hard through the hole, so that it press the reset button on  pcb.
+* Keyboard Maintainer: [binepad](https://github.com/binepad)
+* Hardware Supported:
+    * BN009 R1 *(ft. ATmega32U4)*
+    * BN009 R2 *(ft. STM32F103)*
+* Hardware Availability: [binepad.com](https://www.binepad.com/bn009)
 
 Make example for this keyboard (after setting up your build environment):
 
-    make binepad/bn009:default
+    make binepad/bn009/r1: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).
+..or..
+
+    make binepad/bn009/r2:default
+
+Flashing example for this keyboard:
+
+    make binepad/bn009/r1:default:flash
+
+..or..
+
+    make binepad/bn009/r2:default:flash
+
+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).
+
+## Bootloader
+
+Enter the bootloader in 3 ways:
+
+* **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key) and plug in the keyboard
+* **Physical reset button**: Briefly press the button under the small hole on the back of the macropad
+* **Keycode in layout**: Press the key mapped to `QK_BOOT` or `RESET` if it is available