chore: added Knip

[JoshuaKGoldberg]

Draft PR for reference in triaging #423.

The removed points are:

• async and didyoumean: not referenced anywhere
• cz-conventional-changelog & semantic-release: removed as of Remove validate script #414

@babel/runtime isn't explicitly referenced anywhere, but kcd-scripts build fails if it's not there:

> all-contributors-cli@0.0.0-semantically-released build /home/runner/work/cli/cli
> kcd-scripts build

Error: [BABEL]: You should add @babel/runtime as dependency to your package. It will allow reusing "babel helpers" from node_modules rather than bundling their copies into your files. (While processing: /home/runner/work/cli/cli/node_modules/.pnpm/kcd-scripts@16.0.0_@types+node@25.2.3_typescript@5.9.3/node_modules/kcd-scripts/dist/config/babelrc.js)
    at Object.<anonymous> (/home/runner/work/cli/cli/node_modules/.pnpm/kcd-scripts@16.0.0_@types+node@25.2.3_typescript@5.9.3/node_modules/kcd-scripts/dist/config/babelrc.js:32:9)

[JimMadge]

We might want to bring the commitizen and semantic release packages back as dev dependencies for the release process. I'm not exactly sure what they do.

I expect we would want to keep the existing commit convention and release style just for consistency.

[lwasser]

We might want to bring the commitizen and semantic release packages back as dev dependencies for the release process. I'm not exactly sure what they do.

I expect we would want to keep the existing commit convention and release style just for consistency.

Lemme open an issue as I think I'd personally prefer to remove semantic release - but I do want to talk it out as to why!! in case i'm missing something important !!

[lwasser]

Oh, actually - can you all have a look at #420 please and respond there?