feat(launcher): add portable windows launcher (#976)

* feat(windows): add standalone portable executable, splash screen, and system tray

* test: fix test_get_wsl_windows_user_profile_falls_back_to_users_dir on Windows

* Refactor launcher: isolate desktop logic into launcher.py, clean app.py/requirements, update build scripts, and add tests

* chore: clean launcher test whitespace

---------

Co-authored-by: Alexandre Teixeira <alexandremagteixeira@gmail.com>

launch-windows.ps1

@@ -105,6 +105,14 @@ if (-not $pyExe) {
     }
 }
 
+if ($pyExe -like "*WindowsApps*python.exe") {
+    $pyCmd = Get-Command py -ErrorAction SilentlyContinue
+    if ($pyCmd) {
+        $pyExe = $pyCmd.Source
+        $pyArgs = @("-3.11")
+    }
+}
+
 if (-not $pyExe) {
     Fail "Couldn't find Python 3.11+ for Windows setup. Install Python 3.11+ (or open the Python launcher with 'py -3.11') from https://www.python.org/downloads/, then re-run this script."
 }