feat(v4.0.0): a line from the console breaks a wait

Text for a node from its console, arriving while the node waits for an
answer (AWAIT), is kept as any message is; the wait ends in error 21,
Interrupted; and the text is then done as usual.  Console text for
another node, passing through a node that is waiting, does not end its
wait.

On the hosted program 5 AWAIT ended the program with "the node stopped".
The boot now reports that the line is waiting, the host reads the next
line and hands it over, which breaks the wait, and then has the kept line
done.  The bare-metal host does the same; it is booted in the commit that
follows.

test_host_mesh.c: 76 checks, both widths and the sanitizers.  hosted-check
types 5 AWAIT and two more lines: Interrupted, then 3 and 56.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

v4/capsule/quit.v4

@@ -242,13 +242,22 @@ header SEND-ON
 \ or a GONE about it from this node's centre, error 20, Node gone.  A NACK
 \ about another node is counted, and a GONE about another has its way
 \ forgotten, as they would be if this node were not waiting.
+\ AND A LINE FROM THE CONSOLE BREAKS IT (7b.6): text for this node from its
+\ console is kept, as any message is, the wait ends in error 21,
+\ Interrupted, and the text is then done as usual.  It is the one way to
+\ end a wait on a node that is alive and never answers, short of Hera's
+\ killing that node.
 header AWAIT
 : AWAIT
   (AWAIT-FROM) a! !
   L: (PORT)+8 b! @b  (PORT)+9 b! @b  (PORT) +  dup b!  SWAP  (TAKE-HDR)
   (MQ-HDR) a! @  (ME) a! @  xor if A1  drop jump KEEP
   A1: drop  (MQ-HDR)+2 a! @                                           \ for this node: its type
-      -3 + if ANSWER  -1 + if NACK  -1 + if GONE  drop jump KEEP
+      -1 + if TEXT  -2 + if ANSWER  -1 + if NACK  -1 + if GONE  drop jump KEEP
+  TEXT: drop  (CONSOLE) a! @  if C0  jump C1                          \ text: from the console?
+  C0: drop  (MSG)+1 a! @                                              \ with none told of, whoever sent the text being done
+  C1: (MQ-HDR)+1 a! @  xor if BREAK  drop jump KEEP
+  BREAK: drop  (TAKE-KEEP)  0 (AWAIT-FROM) a! !  NODE-ERROR b! 21 !b ;  \ kept, to be done next; and the wait is over
   ANSWER: drop  (MQ-HDR)+1 a! @  (AWAIT-FROM) a! @  xor if A3  drop jump KEEP
   A3: drop  (MQ-HDR)+6 a! @  -4 + if A4  drop jump KEEP
   A4: drop  0 (AWAIT-FROM) a! !  @b ;                                 \ its one word