Feature request: add agent sub-command

[zanminkian]

Backgroud

@antfu/ni has an na command, which is agent alias. Running na install or na run build will detect and use the right package manager to execute the corresponding command.

• na install ➡️ npm install / pnpm install / yarn install
• na run build ➡️ npm run build / pnpm run build / yarn run build
• na foo bar ➡️ npm foo bar / pnpm foo bar / yarn foo bar

Solution

It's good provide a sub-command named agent in corepack. So that we don't need @antfu/ni

• corepack agent install ➡️ npm install / pnpm install / yarn install
• corepack agent run build ➡️ npm run build / pnpm run build / yarn run build
• corepack agent foo bar ➡️ npm foo bar / pnpm foo bar / yarn foo bar
• ...

If there is no packageManager field in package.json, use npm by default.

Addintion

Providing a cpa command which is the alias of corepack agent will be great.