Move docs/ to docs/en/

It allows comparison between the directories and helps translations.

docs/en/cg_swap.md

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+# Ctrl GUI Swap
+This module allows to swap Ctrl with GUI and vice versa. This will reset on restart to the default implementation
+
+## Enabling the module
+```python
+from kmk.modules.cg_swap import CgSwap
+# cg_swap disabled on startup
+cg_swap = CgSwap()
+# cg_swap enabled on startup
+# cg_swap = CgSwap(cg_swap_enable=True)
+keyboard.modules.append(cg_swap)
+
+keyboard.keymap = [
+	[
+        KC.CG_SWAP, # swap ctrl and gui
+        KC.CG_NORM, # unswap ctrl and gui
+        KC.CG_TOGG, # toggles ctrl and gui swap
+    ],
+]
+```
+