scripts: rebuild the dev loop around build.sh/run.sh

`make` did not parse at all (missing separator at line 139), so every
make target was dead.  The folder also carried three overlapping
launchers (boot.sh, qemu.sh, boot-image.sh) plus a fourth partial one
in the Makefile, `cargo build --package rsdos` copy-pasted eight times,
the QEMU invocation copy-pasted per script, and the test helpers
(fail/wait_log/wait_qemu_exit/qemu_hmp) duplicated in five tests.

New layout:
- scripts/lib.sh: single config (image, OVMF, mem/smp), the one cargo
  invocation (build_all), the one QEMU shape (qemu_args), and the test
  harness (test_boot, wait_log, wait_qemu_exit, qemu_hmp, sendkeys)
- scripts/build.sh: kernel + every bins/* in one pass
- scripts/mksystem.sh: freshness-aware image build that now stages
  every bins/*.efi into /bin/cli|gui (they were never copied before)
- scripts/run.sh: build + stage + boot in one command; --headless,
  --debug (GDB stub), --monitor (HMP socket), --fresh, --mem/--smp/
  --bios/--image; on Wayland it auto-selects XWayland plus
  grab-on-hover so the mouse can be captured (Ctrl+Alt+G toggles)
- scripts/tests/: the five automated tests on the shared harness
- deleted: boot.sh, qemu.sh, boot-image.sh, lib-boot-args.sh,
  build-image-release.sh, build-bootloader.sh (rsboot chain dropped)

The Makefile is now a thin wrapper: make run, make test, make system,
make inspect, make help.  Two-command flow: ./scripts/build.sh then
./scripts/run.sh (run.sh alone also works).

Stale test assumptions fixed so the suite is green again: test-gfx
waited for "gfx: check" while the shell prints "gfx check: PASS";
test-mouse/test-msg hardcoded msgrecv = task 3 (wm-input took slot 3 —
ids are parsed from the log now); the queue-full probe targeted task 0,
whose exec pump drains its own queue as completion codes (moved to the
cursor task, which never recvs).

Verified in QEMU: make test -> test-disk, test-gfx, test-mouse,
test-msg, test-fault all PASS.

1 files changed, 7 insertions, 5 deletions

diff --git a/scripts/sendkeys.py b/scripts/tests/sendkeys.py
index a67903d..9300242 100755
--- a/scripts/sendkeys.py
+++ b/scripts/tests/sendkeys.py
@@ -5,18 +5,20 @@ Each positional argument is one line: it is typed character by character
 (US layout) followed by Enter.  Use it to drive the rs-dos shell from a
 test script without a display.
 
-Usage:
-    sendkeys.py "ls /disk" "echo hi WRITING /disk/a.txt" "poweroff"
-    sendkeys.py --sock /tmp/qmon.sock "date"
+Used by scripts/tests/test-*.sh, and manually against an interactive
+session started with `./scripts/run.sh --monitor`:
 
-Environment: QMON_SOCK (default: /tmp/qmon.sock)
+    ./scripts/tests/sendkeys.py "ls /disk" "date" "poweroff"
+    ./scripts/tests/sendkeys.py --sock /tmp/rsdos-monitor.sock "date"
+
+Environment: QMON_SOCK (default: /tmp/rsdos-monitor.sock)
 """
 import os
 import socket
 import sys
 import time
 
-SOCK = os.environ.get("QMON_SOCK", "/tmp/qmon.sock")
+SOCK = os.environ.get("QMON_SOCK", "/tmp/rsdos-monitor.sock")
 
 # Unshifted punctuation needs QEMU's *named* keys — bare '-'/'.'/'/' are
 # not valid sendkey names (and '-' is the modifier separator).