Replace verbose inline code dumps in `.raw.md`
entries with terse summaries and `git diff`
cmd references. Add `diff_cmd` metadata to each
entry's YAML frontmatter so readers can reproduce
the actual output diff.
Also,
- rename `multiaddr_declare_eps.md_` -> `.md`
(drop trailing `_` suffix)
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Gud Boi