behaviour-keytap: add documentation

docs/docs/behaviors/key-tap.md

@@ -0,0 +1,27 @@
+---
+title: Key Tap Behavior
+sidebar_label: Key Tap
+---
+
+## Summary
+
+The key tap behavior is a combination of key press and release on just pressing the key.
+
+All keycodes including modifiers can be used the same way as with the key press behavior (so standard keycodes are sent for press/release).
+
+It is usefull if you want to make a layout that has the same keycode with and without a modifier close together, e.g. `[` and `{`.
+
+Since `LBRC` is basically just `LSHIFT(LBKT)` it can happen, that you still hold `{` while using `[` which leads to a missed keycode since the base-key is still pressed.
+
+By immediately releasing the key with key tap this is circumvented.
+
+### Behavior Binding
+
+- Reference: `&kt`
+- Parameter: The keycode usage ID from the usage page, e.g. `LBTK` or `A`
+
+Example:
+
+```
+&kt LBKT
+```

docs/sidebars.js

@@ -34,6 +34,7 @@ module.exports = {
       "behaviors/tap-dance",
       "behaviors/caps-word",
       "behaviors/key-repeat",
+      "behaviors/key-tap",
       "behaviors/reset",
       "behaviors/bluetooth",
       "behaviors/outputs",