pathing: sidewall runup precondition via EntryPreparation

Introduce an EntryPreparationState carried on PathNode + A* context so
sidewall parkour can explicitly request one or more runway traverses
before takeoff instead of silently dropping the move. ParkourFeasibility
gains TryGetRequiredStaticEntryRunupSteps + HasPreparedRunup helpers so
long descends (major=5, dy=-1) only remain feasible when the preceding
node proved the runup.

Widen HasDominantAxisRunUp to accept cold-start sprint-jumps within
~3.1-3.5 blocks horizontally so lone overhang / staircase takeoffs stay
feasible without a 2-block runway (matches Baritone's MomentumBehavior
.ALLOWED contract).

Add a runtime SidewallParkourController that implements the corner
commitment + wall-hug chain during execution.

Extend pathing test fixtures with InitialMomentumTicks, add sidewall
accepted/rejected scenarios, and refresh timing + contract baselines to
reflect the new planner shapes. Document the design in
docs/superpowers/specs and plans.

Made-with: Cursor

MinecraftClient.Tests/TestData/Pathing/pathing-planner-contracts.json

@@ -321,26 +321,13 @@
         "endBlock": {
           "x": 622,
           "y": 80,
-          "z": 620
-        }
-      },
-      {
-        "moveType": "Parkour",
-        "startBlock": {
-          "x": 622,
-          "y": 80,
-          "z": 620
-        },
-        "endBlock": {
-          "x": 624,
-          "y": 80,
           "z": 621
         }
       },
       {
         "moveType": "Parkour",
         "startBlock": {
-          "x": 624,
+          "x": 622,
           "y": 80,
           "z": 621
         },

MinecraftClient.Tests/TestData/Pathing/pathing-timing-budgets.json

@@ -148,22 +148,17 @@
   {
     "scenarioId": "obstructed-parkour-l-turns",
     "expectedTotalTicks": 50,
-    "maxTotalTicks": 62,
+    "maxTotalTicks": 80,
     "segments": [
       {
         "moveType": "Parkour",
-        "expectedTicks": 13,
-        "maxTicks": 16
+        "expectedTicks": 20,
+        "maxTicks": 32
       },
       {
         "moveType": "Parkour",
-        "expectedTicks": 21,
-        "maxTicks": 26
-      },
-      {
-        "moveType": "Parkour",
-        "expectedTicks": 16,
-        "maxTicks": 20
+        "expectedTicks": 30,
+        "maxTicks": 48
       }
     ]
   },