Re-license NVIDIA Warp as "Apache-2.0 OR MIT"

Description

Given NVIDIA's broad competitiveness across numerous industries, the prior license creates a situation where any usage of Warp violates the NVIDIA Software License for Warp. Maybe others are OK with contributing to a project with rules which prohibit any and all use, but I find that disturbing, so I open this pull request to re-license NVIDIA Warp as Apache-2.0 OR MIT.

This is the same license the Rust Language project decided to use, and the rationale for that decision was Apache-2.0 makes lawyers happy, and MIT is compatible with GPL projects.

Changelog

Add LICENSE-APACHE
Add LICENSE-MIT
Refactor LICENSE to reference both, and include usage examples

Before your PR is "Ready for review"

[ ] Do you agree to the terms under which contributions are accepted as described in Section 9 the Warp License? No, I disagree with the terms. The purpose of the change is to fix the issue.
[x] Have you read the Contributor Guidelines?
[X] Have you written any new necessary tests?
[x] Have you added or updated any necessary documentation?
[ ] Have you added any files modified by compiling Warp and building the documentation to this PR (.e.g. stubs.py, functions.rst)? N/A
[ ] Does your code pass ruff check and ruff format --check? N/A

NVIDIA / warp