Set a default initial directory, handle an existing settings file with no project directory (#3734)

* Fix the project directory setting assignment from file

* Fix default project directory value initialization

* Add a couple tests for loading the app without project directory settings

* A snapshot a day keeps the bugs away! 📷🐛 (OS: windows-latest)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: windows-latest)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: windows-latest)

* trigger CI

* Object merging logic was bad, blew away other app settings if they existed

* Update silly little export file size expectation numbers

* Make rename timeout in test way shorter

* Fix silly little test issues

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Kurt Hutten Irev-Dev <k.hutten@protonmail.ch>

src/lib/settings/settingsUtils.ts

@@ -14,6 +14,7 @@ import { Configuration } from 'wasm-lib/kcl/bindings/Configuration'
 import { mouseControlsToCameraSystem } from 'lib/cameraControls'
 import { appThemeToTheme } from 'lib/theme'
 import {
+  getInitialDefaultDir,
   readAppSettingsFile,
   readProjectSettingsFile,
   writeAppSettingsFile,
@@ -176,6 +177,11 @@ export async function loadAndValidateSettings(
   if (err(appSettingsPayload)) return Promise.reject(appSettingsPayload)
 
   const settings = createSettings()
+  // Because getting the default directory is async, we need to set it after
+  if (onDesktop) {
+    settings.app.projectDirectory.default = await getInitialDefaultDir()
+  }
+
   setSettingsAtLevel(
     settings,
     'user',