[Keyboard] move That-Canadian 's boards into /maple_computing (#16050)

keyboards/maple_computing/launchpad/keymaps/brandonschlack/readme.md

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+# brandonschlack's layout for Launchpad
+Fun little macropad build, with an awesome case from [StrataKB](https://stratakb.com/store/cases/launchpad-v2-full-case).
+
+## Media Layer
+This layer is used for media controls. Player button is a hotkey to focus the current media player with [BeardedSpice](https://beardedspice.github.io/)
+|   |   |
+|:-:|:-:|
+| Mute | Play/Pause |
+| Vol + | Next Track |
+| Vol - | Prev Track |
+|   | Current Player |
+---
+
+## Keypad Layer
+This layer is used to send keypad keys, meant to be remapped based on current app with [Karabiner](https://pqrs.org/osx/karabiner/)
+|   |   |
+|:-:|:-:|
+| 1 | 2 |
+| 3 | 4 |
+| 5 | 6 |
+| 7 | 8 |
+---
+
+## Magic Layer
+This layer is used as a meta layer for the pad. This layer is accessed by holding key in Row 3, Col 0
+|   |   |
+|:-:|:-:|
+| MAKE | RESET |
+| **Media** Layer | **Keypad** Layer|
+| XXX | XXX |
+| ___ | XXX |