💅 Doc polishing tracking issue

[aaronmondal]

This is for @blakehatch and me to track which files we consider "polished".

• config/basic-configs.mdx
• config/production-config.mdx
• contribute/bazel.mdx
• contribute/cargo.mdx
• contribute/nix.mdx
• deployment-examples/on-prem-overview.mdx
• explanations/architecture.mdx
• explanations/history.mdx
• faq/caching.mdx
• faq/cost.mdx
• faq/hermeticity.mdx
• faq/lre.mdx
• faq/nix.mdx
• faq/remote-execution.mdx
• faq/rust.mdx
• faq/toolchains.mdx
• index.mdx
• introduction/contributors.mdx
• introduction/non-bre.mdx
• introduction/on-prem.mdx
• nativelink-cloud/
• nativelink-cloud/bazel.mdx
• nativelink-cloud/pants.mdx
• nativelink-cloud/reclient.mdx
• reference/glossary.mdx