add home row mods behavior

Author: jasonfuchs

config/corne.keymap

@@ -9,6 +9,29 @@
 #include <dt-bindings/zmk/keys.h>
 
 / {
+    behaviors {
+        hml: home_row_mod_left {
+            compatible = "zmk,behavior-hold-tap";
+            #binding-cells = <2>;
+            flavor = "balanced";
+            require-prior-idle-ms = <150>;
+            tapping-term-ms = <280>;
+            quick-tap-ms = <175>;
+            bindings = <&kp>, <&kp>;
+            hold-trigger-on-release;
+        };
+        hmr: home_row_mod_right {
+            compatible = "zmk,behavior-hold-tap";
+            #binding-cells = <2>;
+            flavor = "balanced";
+            require-prior-idle-ms = <150>;
+            tapping-term-ms = <280>;
+            quick-tap-ms = <175>;
+            bindings = <&kp>, <&kp>;
+            hold-trigger-on-release;
+        };
+    };
+
     keymap {
         compatible = "zmk,keymap";