fix(create): use cwd as rootDir for non-monorepo vp create

When running `vp create` from a subdirectory that has a plain
package.json (without workspaces) somewhere up the tree,
detectWorkspace would walk up and set rootDir to that parent directory.
This caused projects to be created at the parent root instead of the
user's current directory.

Reset rootDir to cwd when isMonorepo is false, since the parent root
is only meaningful for monorepo workspace resolution.

Author: fengmk2

packages/cli/snap-tests-global/create-from-nonworkspace-subdir/package.json

@@ -0,0 +1,4 @@
+{
+  "name": "parent-project",
+  "version": "0.0.0"
+}

packages/cli/snap-tests-global/create-from-nonworkspace-subdir/scripts/.keep

@@ -0,0 +1,6 @@
+> cd scripts && vp create --no-interactive vite:application # from non-monorepo subdir
+> test -f scripts/vite-plus-application/package.json && echo 'Created at scripts/vite-plus-application' || echo 'NOT at scripts/'
+Created at scripts/vite-plus-application
+
+> test ! -f vite-plus-application/package.json && echo 'Not at parent root' || echo 'BUG: created at parent root'
+Not at parent root

packages/cli/snap-tests-global/create-from-nonworkspace-subdir/snap.txt

@@ -0,0 +1,10 @@
+{
+  "commands": [
+    {
+      "command": "cd scripts && vp create --no-interactive vite:application # from non-monorepo subdir",
+      "ignoreOutput": true
+    },
+    "test -f scripts/vite-plus-application/package.json && echo 'Created at scripts/vite-plus-application' || echo 'NOT at scripts/'",
+    "test ! -f vite-plus-application/package.json && echo 'Not at parent root' || echo 'BUG: created at parent root'"
+  ]
+}

packages/cli/snap-tests-global/create-from-nonworkspace-subdir/steps.json

@@ -188,6 +188,13 @@ Use \`vp create --list\` to list all available templates, or run \`vp create --h
   const cwd = process.cwd();
   const workspaceInfoOptional = await detectWorkspace(cwd);
   const isMonorepo = workspaceInfoOptional.isMonorepo;
+
+  // For non-monorepo, always use cwd as rootDir.
+  // detectWorkspace walks up to find the nearest package.json, but for `vp create`
+  // in standalone mode, the project should be created relative to where the user is.
+  if (!isMonorepo) {
+    workspaceInfoOptional.rootDir = cwd;
+  }
   const cwdRelativeToRoot =
     isMonorepo && workspaceInfoOptional.rootDir !== cwd
       ? displayRelative(cwd, workspaceInfoOptional.rootDir)