`tslib` is in devDependencies → `Cannot find module 'tslib'` when loaded as a csdx plugin

[JvE-iO]

tslib is in devDependencies → Cannot find module 'tslib' when loaded as a csdx plugin

Repo: contentstack/launch-cli — package @contentstack/cli-launch

The compiled dist require("tslib") at runtime, but tslib is in devDependencies, not
dependencies. When @contentstack/cli-launch is installed as a plugin of @contentstack/cli,
its devDependencies aren't installed, so tslib is missing and every launch command fails to
load.

Repro:

pnpm add -g @contentstack/cli
csdx launch --help

→ wall of [MODULE_NOT_FOUND] ... Cannot find module 'tslib' for launch, launch:deployments,
launch:environments, launch:functions, launch:logs, launch:open, launch:rollback.

Confirmed from the registry:

$ curl -s https://registry.npmjs.org/@contentstack/cli-launch/1.11.1 | jq '{dep:.dependencies.tslib, dev:.devDependencies.tslib}'
{ "dep": null, "dev": "^2.8.1" }

npm users mostly dodge it because flat node_modules hoists tslib from some other package; a
strict pnpm install surfaces it. Not OS-specific.

Fix: move tslib from devDependencies to dependencies in package.json (or set
importHelpers: false in tsconfig so no runtime tslib is emitted).

Env: cli-launch 1.11.1 (via @contentstack/cli 1.64.0), @oclif/core 4.11.11, pnpm 11.9.0, node 23.9.0.