2023 update

• Add Codespaces and dev container support.
• Reduce README.md since we have the dev container.
• Remove scripts and add them to README.md.
• Update compilers.
• Use ninja-build.
• Introduce MSAN.

CMake improvements

Use cmake tools for download dependencies instead of git submodules.

CI update

v1.3

Improve CI

CI update

v1.2

Fix CI

Simple template with gtest and github CI

v1.1

Fix gtest

Simple template with gtest

v1.0

Update .gitignore