Scarlet Bandana Layout Additions (#20882)

* add matrix_diagram.md

* info.json: apply friendly formatting

* info.json: correct layout data

* rename LAYOUT_all to LAYOUT_65_xt_ansi_split_space_split_bs

* add LAYOUT_65_xt_ansi_split_space

* add LAYOUT_65_xt_ansi_split_bs

* add LAYOUT_65_xt_ansi

* update readme.md

- convert metadata section to list
- update Availability link (mark as "no longer available" as the vendor no longer ships)
- add Flashing and Bootloader instructions

keyboards/woodkeys/scarletbandana/readme.md

@@ -1,11 +1,23 @@
 # Scarlet Bandana Version IV Mark 2
 
-Keyboard Maintainer: [Cole Markham](https://github.com/colemarkham)  
-Hardware Supported: Scarlet Bandana Version IV Mark 2  
-Hardware Availability: [WoodKeys.click](https://woodkeys.click/product/scarlet-bandana-version-iv-mark-2/)  
+* Keyboard Maintainer: [Cole Markham](https://github.com/colemarkham)
+* Hardware Supported: Scarlet Bandana Version IV Mark 2
+* Hardware Availability: [~~WoodKeys.click~~ (no longer available)](https://woodkeys.click/product/scarlet-bandana-version-iv-mark-2/)
 
 Make example for this keyboard (after setting up your build environment):
 
     make woodkeys/scarletbandana:default
 
+Flashing example for this keyboard:
+
+    make woodkeys/scarletbandana: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 or Escape) and plug in the keyboard
+* **Physical reset button**: Briefly press the button on the back of the PCB - some may have pads you must short instead
+* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available