fix(shadow/npm): wrap path.join calls with normalizePath

Wraps all path.join() calls in getArboristClassPath(), getArboristEdgeClassPath(),
getArboristNodeClassPath(), and getArboristOverrideSetClassPath() with normalizePath()
to ensure cross-platform compatibility. Fixes Windows test failures where backslashes
were returned instead of forward slashes.

Author: jdalton

packages/cli/src/shadow/npm/paths.mts

@@ -26,9 +26,8 @@ export function getArboristPackagePath() {
 let _arboristClassPath: string | undefined
 export function getArboristClassPath() {
   if (_arboristClassPath === undefined) {
-    _arboristClassPath = path.join(
-      getArboristPackagePath(),
-      'lib/arborist/index.js',
+    _arboristClassPath = normalizePath(
+      path.join(getArboristPackagePath(), 'lib/arborist/index.js'),
     )
   }
   return _arboristClassPath
@@ -37,25 +36,28 @@ export function getArboristClassPath() {
 let _arboristEdgeClassPath: string | undefined
 export function getArboristEdgeClassPath() {
   if (_arboristEdgeClassPath === undefined) {
-    _arboristEdgeClassPath = path.join(getArboristPackagePath(), 'lib/edge.js')
+    _arboristEdgeClassPath = normalizePath(
+      path.join(getArboristPackagePath(), 'lib/edge.js'),
+    )
   }
   return _arboristEdgeClassPath
 }
 
 let _arboristNodeClassPath: string | undefined
 export function getArboristNodeClassPath() {
   if (_arboristNodeClassPath === undefined) {
-    _arboristNodeClassPath = path.join(getArboristPackagePath(), 'lib/node.js')
+    _arboristNodeClassPath = normalizePath(
+      path.join(getArboristPackagePath(), 'lib/node.js'),
+    )
   }
   return _arboristNodeClassPath
 }
 
 let _arboristOverrideSetClassPath: string | undefined
 export function getArboristOverrideSetClassPath() {
   if (_arboristOverrideSetClassPath === undefined) {
-    _arboristOverrideSetClassPath = path.join(
-      getArboristPackagePath(),
-      'lib/override-set.js',
+    _arboristOverrideSetClassPath = normalizePath(
+      path.join(getArboristPackagePath(), 'lib/override-set.js'),
     )
   }
   return _arboristOverrideSetClassPath