feat(types)!: drop the Cloud namespace re-export from the root entry (objectui#8225)

`@object-ui/types` re-exported the whole `@objectstack/spec/cloud` subpath as
the `Cloud` type namespace. The objectstack#16325 ruling (director batch #62,
option B) takes the cloud control-plane contracts out of `@objectstack/spec`,
and the spec's `./cloud` subpath is deleted upstream once cloud and objectui
stop importing it. This is step 2 of 3: the single import in this repository.

- `packages/types/src/index.ts`: the `export type * as Cloud` line is removed
  and the gap in the 15-line namespace family is marked in place so it reads
  as deliberate (14 re-exports remain)
- changeset (`@object-ui/types` minor, breaking spelled out): the `Cloud`
  namespace is gone, no alias and no deprecation window
- measured at `289d14687`: 0 `Cloud.` member accesses and 0 named `Cloud`
  imports from `@object-ui/types` across 4106 tracked ts/tsx files under
  `packages/**` and `apps/**` (PCRE census; the same regex fires on the
  consumed siblings `UI.` and `Data.`), 0 star re-exports of `@object-ui/types`
  in other packages, and 0 imports of the spec's cloud subpath outside that line

Author: hotlong

.changeset/8225-drop-cloud-namespace-reexport.md

@@ -0,0 +1,27 @@
+---
+'@object-ui/types': minor
+---
+
+**Breaking for `@object-ui/types` consumers:** the `Cloud` type namespace is
+REMOVED from the package's root entry. `export type * as Cloud from
+'@objectstack/spec/cloud'` is gone, so `import type { Cloud } from
+'@object-ui/types'` and every `Cloud.X` member access now fail to compile
+(TS2305 / TS2694). No alias and no deprecation window are left — the maintainer's
+standing posture is immediate removal (objectui#8225; step 2 of 3 of the
+objectstack#16325 ruling, option B: the cloud control-plane contracts leave
+`@objectstack/spec`, and the spec's `./cloud` subpath is deleted upstream once
+cloud and objectui stop importing it).
+
+The rest of the namespace family — `Data`, `UI`, `System`, `AI`, `API`,
+`Automation`, `Shared`, `QA`, `Kernel`, `Contracts`, `Integration`, `Studio`,
+`Identity`, `Security` (14 re-exports) — is unchanged; the gap in that block is
+deliberate and is marked in place.
+
+Measured in this repository at `289d14687`: zero consumers of the `Cloud`
+namespace across `packages/**` and `apps/**` (a `Cloud.` member-access census
+plus a named-import census, both 0 against a control of 15 namespace re-export
+lines in the same file), and zero imports of the spec's cloud subpath outside
+that one line — the three cloud-shaped types objectui does use
+(`PackageTranslation`, `resolvePackageL10n`'s result, `PackageManifest`) were
+already declared inline in `app-shell` rather than imported. No runtime
+behaviour changes; the emitted JavaScript is identical.

packages/types/src/index.ts

@@ -1117,7 +1117,9 @@ export type * as UI from './spec-ui-namespace.js';
 export type * as System from '@objectstack/spec/system';
 export type * as AI from '@objectstack/spec/ai';
 export type * as API from '@objectstack/spec/api';
-export type * as Cloud from '@objectstack/spec/cloud';
+// `Cloud` is deliberately absent from this family since objectui#8225: the
+// cloud control-plane contracts leave the spec's public surface (objectstack#16325,
+// option B), so nothing here re-exports that subpath and no consumer reads it.
 export type * as Automation from '@objectstack/spec/automation';
 export type * as Shared from '@objectstack/spec/shared';
 export type * as QA from '@objectstack/spec/qa';