literate: convert org/box-renderable.org from doc-only to tangle source

Now tangles to box.lisp + text.lisp + box-tests.lisp.
Deleted hand-written originals and regenerated — GREEN.

src/components/text.lisp

@@ -61,8 +61,7 @@
                   do (draw-text backend x (+ y row) line fg bg)))))))
 
 (defun word-wrap (text max-width)
-  "Split TEXT into lines, each <= MAX-WIDTH chars.
-Breaks at word boundaries. Words exceeding MAX-WIDTH are hard-broken."
+  "Split TEXT into lines, each <= MAX-WIDTH chars."
   (if (or (zerop max-width) (zerop (length text)))
       (list "")
       (let ((words (split-string text)) (lines nil) (current nil) (current-len 0))