First full pass of the pnpm fmt toolchain: markdown table alignment,
TOML array wrapping, CSS/HTML expansion in the enclosure concept page.
No content changes; mermaid blocks untouched.
Proves add -> commit -> push over HTTPS+PAT via libgit2 (git2), the
ADR-004 fallback after gitoxide was found to lack HTTP(S) push. Host
crate on stable, kept out of the xtensa firmware tree.