feat: pull-up/dead-hang/hanging-knee-raise grip the bar via grip directive (L3.2)

Author: a-baran-orhan

spec/examples/dead-hang.posecode

@@ -7,16 +7,14 @@ posecode exercise "Dead hang"
     shoulders: flex 175
     elbows: flex 5
     elbows: pronate 80
-    fingers: flex 80
     ground-lock: feet
     cue "Reach up and grip the bar"
 
   step "Hang" 3s ease-in-out:
     shoulders: flex 175
     elbows: flex 5
     elbows: pronate 80
-    fingers: flex 80
-    pin: hands bar
+    grip: hands bar
     cue "Relax into a long, straight-arm hang"
 
   step "Down" 1.5s ease-out:

spec/examples/hanging-knee-raise.posecode

@@ -7,17 +7,15 @@ posecode exercise "Hanging knee raise"
     shoulders: flex 175
     elbows: flex 5
     elbows: pronate 80
-    fingers: flex 80
     ground-lock: feet
     cue "Reach up and grip the bar"
 
   step "Grip" 0.7s ease-in-out:
     shoulders: flex 175
     elbows: flex 5
     elbows: pronate 80
-    fingers: flex 80
-    pin: hand_left bar
-    pin: hand_right bar
+    grip: hand_left bar
+    grip: hand_right bar
     cue "Hang from the bar overhead, arms long, body still"
 
   step "Raise knees" 1.2s ease-out:
@@ -26,9 +24,8 @@ posecode exercise "Hanging knee raise"
     shoulders: flex 175
     elbows: flex 5
     elbows: pronate 80
-    fingers: flex 80
-    pin: hand_left bar
-    pin: hand_right bar
+    grip: hand_left bar
+    grip: hand_right bar
     cue "Draw both knees up toward the chest"
 
   step "Lower" 1.4s ease-in:
@@ -37,9 +34,8 @@ posecode exercise "Hanging knee raise"
     shoulders: flex 175
     elbows: flex 5
     elbows: pronate 80
-    fingers: flex 80
-    pin: hand_left bar
-    pin: hand_right bar
+    grip: hand_left bar
+    grip: hand_right bar
     cue "Lower the legs under control, staying in a steady hang"
 
   step "Release" 0.8s ease-in:

spec/examples/pull-up.posecode

@@ -7,38 +7,34 @@ posecode exercise "Pull-up"
     shoulders: flex 175
     elbows: flex 5
     elbows: pronate 80
-    fingers: flex 80
     ground-lock: feet
     cue "Reach up and grip the bar"
 
   step "Hang" 0.7s ease-in-out:
     shoulders: flex 175
     elbows: flex 5
     elbows: pronate 80
-    fingers: flex 80
-    pin: hands bar
+    grip: hands bar
     cue "Hang from the bar, arms long, shoulders active"
 
   step "Pull up" 1.2s ease-out:
     shoulders: flex 105
     elbows: flex 130
     elbows: pronate 80
-    fingers: flex 80
     spine: extend 15
     chest: extend 10
     neck: extend 20
-    pin: hands bar
+    grip: hands bar
     cue "Pull the chest toward the bar, driving the elbows down"
 
   step "Lower" 1.4s ease-in:
     shoulders: flex 175
     elbows: flex 5
     elbows: pronate 80
-    fingers: flex 80
     spine: extend 0
     chest: extend 0
     neck: extend 0
-    pin: hands bar
+    grip: hands bar
     cue "Lower under control back to a full hang"
 
   step "Release" 0.8s ease-in: