feat(userspace): terminal server + shell desktop; US keymap w/ shift; libkos allocator multi-page fix; panics print

scripts/make-disk-image.sh

@@ -30,6 +30,8 @@ copy log-server     "log.elf"
 copy permission-manager "permis.elf"
 copy storage-qemu   "storage.elf"
 copy session-server "session.elf"
+copy terminal-server "terminal.elf"
+copy shell      "shell.elf"
 # Only the test image: its presence makes init run the SMP self-test.
 if [ -n "${SMPTEST:-}" ]; then
     copy smptest    "smptest.elf"