[dune] Refactor files following advice from upstream.

After some discussion upstream, I think that for the current a
multi-package setup in a single repository this setup saves a bit
work.

The most problematic bit is the `-rectypes` flag; its status is not
saved per-library so we must either duplicate the flags in the coqide
scope (scope == dune-project file), or unify its scope with Coq. We do
this last option as this seems like the easiest thing for now.

Changes:

- Move coqide.opam file to the root, use a single scope/`dune-project` file.
- Remove `dune-workspace`, this should be owned by the developer / user.

1 files changed, 6 insertions, 0 deletions

diff --git a/dune b/dune
index b758fc7b56..f867126f9e 100644
--- a/dune
+++ b/dune
@@ -1,3 +1,9 @@
+; Default flags for all Coq libraries.
+(env
+ (dev     (flags :standard -rectypes -w -9-27-50+60))
+ (release (flags :standard -rectypes)))
+
+; Rules for coq_dune
 (rule
  (targets .vfiles.d)
  (deps