Move docs/ to docs/en/

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docs/en/boot.md

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+# boot.py
+`boot.py` lives in the root of your keyboard when mounted as a storage device. 
+There is a more detailed explanation in the [circuit python docs](https://docs.circuitpython.org/en/latest/README.html), 
+however there are some common use cases for your keyboard listed here.
+
+## Hiding device storage
+You can hide your device from showing up as a USB storage by default (this can be overridden 
+at startup if desired, per the example code further down this page).
+
+```python
+storage.disable_usb_drive()
+```
+
+## Using your keyboard before the OS loads
+You can make your keyboard work in your computer's BIOS and bootloader (useful if you dual-boot).
+
+```python
+usb_hid.enable(boot_device=1)
+```
+
+## Disabling serial communication
+By default, you can connect to your board's serial console, which can be useful for debugging, 
+but may not be desired for everyday use.
+
+```python
+# Equivalent to usb_cdc.enable(console=False, data=False)
+usb_cdc.disable()
+```
+
+## Example code
+Below is a fully working example, which disables USB storage, CDC and enables BIOS mode.
+
+```python
+import supervisor
+import board
+import digitalio
+import storage
+import usb_cdc
+import usb_hid
+
+from kb import KMKKeyboard
+from kmk.scanners import DiodeOrientation
+
+
+# If this key is held during boot, don't run the code which hides the storage and disables serial
+# This will use the first row/col pin. Feel free to change it if you want it to be another pin
+col = digitalio.DigitalInOut(KMKKeyboard.col_pins[0])
+row = digitalio.DigitalInOut(KMKKeyboard.row_pins[0])
+
+if KMKKeyboard.diode_orientation == DiodeOrientation.COLUMNS:
+    col.switch_to_output(value=True)
+    row.switch_to_input(pull=digitalio.Pull.DOWN)
+else:
+    col.switch_to_input(pull=digitalio.Pull.DOWN)
+    row.switch_to_output(value=True)
+
+if not row.value:
+    storage.disable_usb_drive()
+    # Equivalent to usb_cdc.enable(console=False, data=False)
+    usb_cdc.disable()
+    usb_hid.enable(boot_device=1)
+
+row.deinit()
+col.deinit()
+```