update "data representation" part of guile internals doc

update "data representation" part of guile internals doc

* doc/ref/api-control.texi (Handling Errors): Move the "Signalling Type
  Errors" section here.

* doc/ref/data-rep.texi (Data Representation): Refactor, lopping and
  cropping and stitching.

* doc/ref/libguile-concepts.texi (Dynamic Types):
* doc/ref/libguile-smobs.texi (Describing a New Type, Double Smobs):
* doc/ref/guile.texi (Guile Implementation, Programming in C): Adapt to
  refactorings.

* doc/ref/history.texi (A Scheme of Many Maintainers):
  (A Timeline of Selected Guile Releases, Status): Update.