Thorsten Kaufmann

Add support for python 3.12+ and drop support for 3.7

3

Fixes #1948. Builds on #1943 as many of the issues are due to outdated vendored dependencies.

**Motivation** Even though vfxplatform has not yet officially switched to python 3.12 it would still be good to add support for 3.12 and 3.13. Python 3.11 is already in "security"...

Support authentication for non pypi package indices

4

We are running an internal pypi index (in our case Nexus) as a proxy (for blacklisting and whitelisting) as well as for internal packages. rez-pip fails for this index because...