[Keyboard] add laneware `raindrop` keyboard (#21277)

Co-authored-by: Sergey Vlasov <sigprof@gmail.com>
Co-authored-by: Ryan <fauxpark@gmail.com>

1 files changed, 38 insertions, 0 deletions

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+# Raindrop
+
+![stacked](https://i.imgur.com/R2iPqjIh.png)  
+*Casing*  
+![PCB Front](https://i.imgur.com/00TpL3nh.png)  
+*PCB Front*  
+
+60% sized keyboard with a gasket mounted plate and aluminium case, made by Laneware Peripherals.
+
+* Keyboard Maintainer: [Laneware Peripherals](https://github.com/laneware)
+* Hardware Supported: Raindrop PCB
+* Hardware Availability: Group Buy
+
+## Layouts
+The Raindrop PCB can be configured in the following key layouts: 
+| Key Layout | Keymap | Diagram |
+| :---: | :---: | :---: |
+| Standard 60% | default | ![diagram_ansi](https://i.imgur.com/oibG44o.png) |
+| 2u Left Shift with Arrow Keys | arrows | ![diagram_arrows](https://i.imgur.com/cQ4Kwb5h.png) |
+| HHKB with 6.25 Spacebar | hhkb | ![diagram_hhkb](https://i.imgur.com/WU6gb1Qh.png) |
+
+Make example for this keyboard (after setting up your build environment):
+
+    make raindrop:default
+
+Flashing example for this keyboard:
+
+    make raindrop: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