Added standard c_flags to jscoq_extern.

f67e5e27 modifies the dist rule in the Makefile.

This should cleanup the root directory a bit; I've placed the cli
files inside `frontend`, but quite a few of these files should
eventually move to backend, as it seems to me that they functionality
that the "server" should provide, but we can do like this for now and
move things to `backend` as we see fit.

In `jscoq` build target.
Eventually `wa-build` will be discontinued and we'll have a single build.

We reorganize jsCoq's source code as to be more modular, in particular
we start to place backend files under the `backend` directoy, and
frontend files under `frontend`.

Code as it now does work, note however that still quite a bit of work
is needed. In particular, the headless frontend should get its own
directory, the coq-jslib directory should go away, use more types,
etc...

Build order fluctuations caused errors in our CI because of deps
not being built when needed, specifically for Ltac2.

Until this is changed in Coq, apply this patch copied from master.

 * In OPAM 2.1 it seems that space-separated package names are obsolete.
   Using comma, which seems to also work with 2.0.8.
 * Specified that Node.js >= 16 is required (for CLI).

Partial; allows to quickly make preview versions for the website.
As long as there are no changes that require a rebuild of Coq, the addons
need not be recompiled.
But ofc the Makefile+Dockerfile have no way to know.

Makefile does not sporadically run `docker rm -f` and
`docker system prune -f` unless the user is aware of what is going
to happen.

A bind-mount is too slow.
`sudo` is required to copy onto the volume.
The implementation is currently non-reentrant, so `-j1` is needed.

Allow specifying sub-branch for quick testing of feature branches.
Makefile targets for uploading SDK images to Dockerhub.

When mounting `/home`, gosu may inadvertantly write to the host's
because of `useradd`.

Allows a dev to only build core jsCoq and SDK.

Cleanup apt lists.

Use gosu to allow running commands with local user permissions
in bind directories (for sdk).

I have changed it a bit so that switching branches requires just
changing a single line in each of Makefile and Dockerfile.

`trampoline.patch`.

How did that happen.

The script has been renamed `adopt-addons`, because "consume"
sounds a bit harsh.

In case the certificates in the Debian image are too old, blocking
installation of OPAM via wget.

Adjusted default URLs and branches.

- Migrated patches for 8.14.
- Up wacoq to 8.14 in docker image
- install: 8.14 requires `coq-core` and `coq-stdlib` to be installed.
- Set version 0.14.0.

Should be in `_build/dist`, and end with `-npm.tgz`.
I'm changing `.tar.gz` to `.tgz` to be consistent with what `npm pack`
generates.

This requires running with BuildKit if you want to build only one of
the branches.