Nightly build 2025.01.16

What's Changed

Toolchain and implementation changes 🛠️

• Update LLVM by @bricknerb in #4807
• Add Support for #include in cpp files imported from Carbon by @bricknerb in #4809
• Remove node_stack Peek templating where possible by @jonmeow in #4801
• Move the complete_witness_type above the !members label. by @danakj in #4808

Documentation changes 📝

• Update a few faq questions which are showing their age by @jonmeow in #4813

Other changes

• Switch some codeblocks to recognized languages. by @zygoloid in #4811
• Fix rendering of https://docs.carbon-lang.dev/proposals/p2188.html by @zygoloid in #4802

Full Changelog: v0.0.0-0.nightly.2025.01.15...v0.0.0-0.nightly.2025.01.16