feat(v4.0.0): the Q48.16 words and DUMP at the prompt

- capsule/qmath.v4: Q.FROM-INT Q.TO-INT Q.1 Q.0 Q.SCALE Q.+ Q.- Q.* Q./
  Q.ABS Q.NEG Q.= Q.< Q.> Q.0= Q.MAX Q.MIN Q.EXP Q.SQRT Q.LOG Q.SIN Q.COS
  Q.PRINT -- the definitions test_foundation.c executes on the mesh node,
  now in the host node's vocabulary.
- numout.v4: DUMP.
- Q./ by zero, and Q.SQRT and Q.LOG outside their domain, leave the
  result D-11 and D-12 give and then raise an error (D-18): "Division by
  zero", "Argument out of range".  v3 returns 0 silently.
- tests/test_host_quit.c: 122 results printed by Q.PRINT are transcripts
  of the v3 binary, the same at both cell widths; signed values, the
  errors and DUMP's layout besides.

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

v4/capsule/numout.v4

@@ -116,3 +116,38 @@ header .S
      PICK DOT
      (W)+2 b! @b -1 + !b  jump L
   DONE: drop  jump CR
+
+\ ---- DUMP ----
+\ ( baddr u -- )   u bytes from the byte address baddr, sixteen to a line: the
+\ address, the bytes in hex, and the bytes as characters between bars.
+\ Everything it keeps between words is in (DP): the saved BASE, the address,
+\ the count and the column.  ADDR-DIGITS is two for each byte of a cell.
+: (DB) ( -- c )   (DP)+1 b! @b  (DP)+3 b! @b  +  jump C@
+header DUMP
+: DUMP
+  -if OK  drop drop  NODE-ERROR b! 1 !b ;
+  OK: (DP)+2 b! !b  (DP)+1 b! !b
+      BASE b! @b (DP) b! !b  16 BASE b! !b
+  LINE: (DP)+2 b! @b  if DONE  drop
+      (DP)+1 b! @b 0 <#  ADDR-DIGITS (DP)+3 b! !b
+      AD: #  (DP)+3 b! @b -1 + dup !b  if ADX  drop jump AD
+      ADX: drop  #> TYPE  58 EMIT SPACE
+      0 (DP)+3 b! !b
+      HX: (DP)+2 b! @b  (DP)+3 b! @b inv +  -if HAVE
+          drop SPACE SPACE SPACE jump HN
+      HAVE: drop (DB) 0 <# # # #> TYPE SPACE
+      HN: (DP)+3 b! @b 1 + dup !b  -16 + -if HXX  drop jump HX
+      HXX: drop  SPACE 124 EMIT
+      0 (DP)+3 b! !b
+      CH: (DP)+2 b! @b  (DP)+3 b! @b inv +  -if HAVC  jump CHX
+      HAVC: drop (DB)
+          dup -32 + -if GE  drop drop 46 jump EM
+          GE: drop  dup -127 + -if BIG  drop jump EM
+          BIG: drop drop 46
+          EM: EMIT
+          (DP)+3 b! @b 1 + dup !b  -16 + -if CHX  drop jump CH
+      CHX: drop  124 EMIT CR
+      (DP)+1 b! @b 16 + !b
+      (DP)+2 b! @b -16 +  -if MORE  jump DONE
+      MORE: !b  jump LINE
+  DONE: drop  (DP) b! @b BASE b! !b ;