Merge Move and slide into Move with a 'Collide with solids' toggle

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

tools/e2e.mjs

@@ -582,7 +582,7 @@ try {
   await sleep(200);
 
   // 15b. Solid vs trigger. Put the blue crate 150 to the right of the red one (both 100 wide →
-  //      50 of free travel) and hold ArrowRight: the Mover's "Move and slide" parks the red
+  //      50 of free travel) and hold ArrowRight: the Mover's Move (Collide with solids) parks the red
   //      crate flush against the blue one at world x = −100. Making the blue collider a
   //      trigger lets it pass through instead (the collider is then drawn amber).
   const holdRight = async (ms) => {
@@ -607,7 +607,7 @@ try {
     return w.entities.find((e) => e.objectId === 'o1');
   };
   const blocked = await playAgainstBlue(false);
-  check('Move and slide stops the red crate flush against the blue crate\'s solid collider', blocked && Math.abs(blocked.x - -100) < 0.01, `world x=${blocked?.x}`);
+  check('Move with "Collide with solids" stops the red crate flush against the blue crate\'s solid collider', blocked && Math.abs(blocked.x - -100) < 0.01, `world x=${blocked?.x}`);
   const passed = await playAgainstBlue(true);
   check('a trigger collider does not block (the crate passes through)', passed && passed.x > -100 + 20, `world x=${passed?.x}`);
   await evaluate(`__gm.state.select({ kind: 'object', objectId: 'oc2' })`);

tools/seed-demo.mjs

@@ -14,7 +14,7 @@ if (!projectId) {
  * "Mover" behavior in five nodes: every frame, move the owner along the normalized arrow-key
  * axis, scaled by the `speed` variable per second (On update's dt feeds the dt input).
  * Diagonals are not faster than straight moves because Axis input normalizes the vector, and
- * "Move and slide" stops the owner's solid colliders at other solid colliders.
+ * Move's "Collide with solids" stops the owner's solid colliders at other solid colliders.
  */
 const moverGraph = {
   nodes: [
@@ -22,7 +22,7 @@ const moverGraph = {
     { id: 'n-owner', type: 'Owner', x: 0, y: 120, params: {} },
     { id: 'n-axis', type: 'AxisInput', x: 0, y: 200, params: {} },
     { id: 'n-speed', type: 'GetVariable', x: 0, y: 400, params: { variable: 'speed' } },
-    { id: 'n-move', type: 'MoveAndSlide', x: 340, y: 0, params: {} },
+    { id: 'n-move', type: 'Move', x: 340, y: 0, params: { collide: true } },
   ],
   edges: [
     { id: 'e1', from: { node: 'n-update', port: 'exec' }, to: { node: 'n-move', port: 'exec' } },