Initial Release (v1.8+8.18) for Coq 8.18

This release updates the library to Coq 8.18. It includes the Tennenbaum development, and re-licenses the library to MIT.

This version is the first with a version number, namely 1.0.

v1.0+8.17 for Coq 8.17

This release backports the v1.0+8.18 release to Coq 8.17.

Tennenbaum's Theorem

This fixes the state of the FOL library corresponding to the journal version of the paper "An Analysis of Tennenbaum's Theorem in Constructive Type Theory" by Marc Hermes and Dominik Kirst.