app: the windows-sys features WriteFile and MiniDumpWriteDump need (#299)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo

apps/fieldcraft/Cargo.toml

@@ -46,8 +46,12 @@ windows-sys = { version = "0.61", features = [
     "Win32_Security",
     "Win32_Storage_FileSystem",
     "Win32_System_Diagnostics_Debug",
+    # WriteFile's OVERLAPPED.
+    "Win32_System_IO",
     "Win32_System_Kernel",
     "Win32_System_LibraryLoader",
+    # MiniDumpWriteDump.
+    "Win32_System_Memory",
     "Win32_System_Threading",
 ] }