feat(completion): print completion code to stdout (#7597)

* feat(completion): generate-completion

close #3083

* feat: better error message

* test: generate-completion

* feat(completion): add powershell

* chore(deps): update @pnpm/tabtab to 0.3.0

* switch to provided type declarations
* fix typings
* update tests
* update bundle scripts

* refactor: remove unnecessary `??`

* refactor: replace a type def with provided types

* chore(deps): update @pnpm/tabtab to 0.4.0

* feat(cli): rename completion command

* chore(deps): update @pnpm/tabtab to 0.4.1

* refactor: use tabtab's new features

* fix: pass shell

* chore(deps): update @pnpm/tabtab to 0.5.0

* chore(deps): update @pnpm/tabtab to 0.5.1

* fix: remove unused import

* refactor: move completion to plugins

* feat: remove `{install,uninstall}-completion`

Just `pnpm completion` is enough

* test: fix

* refactor: direct import

* refactor: move tests to next to the lib

* refactor: merge 2 packages into 1

* fix: update changeset and remove install-completion

cli/command/package.json

@@ -28,6 +28,9 @@
   },
   "homepage": "https://github.com/pnpm/pnpm/blob/main/cli/command#readme",
   "funding": "https://opencollective.com/pnpm",
+  "dependencies": {
+    "@pnpm/tabtab": "^0.5.2"
+  },
   "devDependencies": {
     "@pnpm/command": "workspace:*"
   },

cli/command/src/index.ts

@@ -1,6 +1,6 @@
-export interface Completion { name: string, description?: string }
+import { type CompletionItem } from '@pnpm/tabtab'
 
 export type CompletionFunc = (
   options: Record<string, unknown>,
   params: string[]
-) => Promise<Completion[]>
+) => Promise<CompletionItem[]>