[NonGNU ELPA] New package: sqlite3

[Jonas Bernoulli]

Sqlite3 provides a module for SQLite.  It comes with the Elisp library
necessary for the metadata and to compile the module on first use.

The new SQLite support in Emacs 29 was inspired by this module.

I have contacted the author and he agrees with adding his package here.

The motivation for adding this package now is that the next EmacSQL
release is going to depend on it.  EmacSQL is already on NonGNU-devel
ELPA, but the upcoming 4.0.0 will be the first release available from
the stable channel.

This EmacSQL release adds two new back-ends, one using the new builtin
SQLite support, and the other using this module.  The back-end using
builtin support is preferred but requires Emacs 29, compiled with SQLite
support.  If that is not available, the module back-end should be used.
The old back-end, which uses a custom SQLite binary, remains but should
only be used if all other options are exhausted.

If there are no objections or questions, I will add this in a few days.

     Cheers,
     Jonas