refactor(cli)!: namespace the profile and bundle manifests under dsh.profile and dsh.bundle

A profile manifest and a bundle manifest are different kinds and shared one
flat `dsh` section: `dsh.plugins` listed bundles (not plugins) and `dsh.patch`
declared a bundle's layer. Each kind now names its role — a bundle declares
`dsh.bundle.patch`, a profile declares `dsh.profile.bundles` — so a
package.json states which role it plays and the list name matches its contents.

`DEFAULT_PROFILE_PLUGINS` becomes `DEFAULT_PROFILE_BUNDLES`, and
`DshManifestSection` splits into `DshBundleManifest`/`DshProfileManifest`.
Pre-release: no compatibility shim; turtle-ui moved with it (bd5ff10).

packages/bundle/base/src/index.ts

@@ -1,6 +1,6 @@
 /**
  * @deepseek-ai/dsh-base — the shared dsh core as a profile bundle. The
- * package's substance is `cordis.patch.yml`, declared by the `dsh.patch`
+ * package's substance is `cordis.patch.yml`, declared by the `dsh.bundle.patch`
  * manifest field and resolved by the profile composer through that field;
  * this module carries no runtime API.
  * @module @deepseek-ai/dsh-base