Create projects separately in home page tests

I think creating them in Promise.all was introducing nondeterminism and
making tests flaky.

e2e/playwright/projects.spec.ts

@@ -1527,12 +1527,10 @@ test(
   { tag: '@electron' },
   async ({ context, page, cmdBar, homePage }, testInfo) => {
     await context.folderSetupFn(async (dir) => {
-      await Promise.all([
-        fsp.mkdir(path.join(dir, 'router-template-slate'), { recursive: true }),
-        fsp.mkdir(path.join(dir, 'bracket'), { recursive: true }),
-      ])
-      await Promise.all([
-        fsp.copyFile(
+      await fsp.mkdir(path.join(dir, 'router-template-slate'), {
+        recursive: true,
+      })
+      await fsp.copyFile(
         path.join(
           'src',
           'wasm-lib',
@@ -1542,8 +1540,9 @@ test(
           'router-template-slate.kcl'
         ),
         path.join(dir, 'router-template-slate', 'main.kcl')
-        ),
-        fsp.copyFile(
+      )
+      await fsp.mkdir(path.join(dir, 'bracket'), { recursive: true })
+      await fsp.copyFile(
         path.join(
           'src',
           'wasm-lib',
@@ -1553,8 +1552,7 @@ test(
           'focusrite_scarlett_mounting_braket.kcl'
         ),
         path.join(dir, 'bracket', 'main.kcl')
-        ),
-      ])
+      )
     })
     const u = await getUtils(page)
     await page.setBodyDimensions({ width: 1200, height: 500 })