Tech debt: "Remove itself" — define the intent

Tracked in `roadmap.md` *Tech debts* as: **"Remove itself"**

Recorded as a one-line note; the intent needs writing down before this is actionable.

The likely reading is an eject path — letting a generated project drop its dependency on the `gonext` CLI/library and stand alone on plain `go`/`make` targets. Confirm or correct that before scoping.

Start with the one-line entry in roadmap.md under “Tech debts” and inspect how gonext relates to generated projects, its CLI/library, and plain go/make targets. Confirm or correct whether “Remove itself” means an eject path, then document the intent and boundaries clearly enough for a later implementation to be scoped.

Written by the indexing model from the issue text.