The docs told authors to run `npx create-trek-plugin` / `npx trek-plugin`,
but nothing published under those names, so npx couldn't resolve them.
- Ship one package, `trek-plugin-sdk`, with a bin that matches the package
name (`trek-plugin-sdk`) so `npx trek-plugin-sdk <command>` resolves with
zero install. The dispatcher gained a `create` subcommand, so every step
(create/validate/pack/entry/release) runs through that one entry point.
The short `trek-plugin` / `create-trek-plugin` bins still work once
installed.
- Package hardening for publish: repository+directory (monorepo subdir),
homepage/bugs/author/engines, publishConfig public, a prepublishOnly that
builds + tests, and a LICENSE file.
- A publish workflow: pushing a `plugin-sdk-v*` tag builds and publishes with
the NPM_TOKEN repo secret.
- Docs (SDK README + the four wiki pages) now use `npx trek-plugin-sdk <cmd>`,
the invocation that actually resolves.
Maurice