refactor: relocate demo app bundles to packages/examples/*-demo

Move the agent-spine bundle and the stdio/ACP/JSON-RPC app packages out of
core/ and ui/ into a new packages/examples/ group, renamed with a -demo
suffix so the npm name marks them as non-product surface:

  core/agent-core   -> examples/agent-spine-demo  (dsh-agent-spine-demo)
  ui/stdio-agent    -> examples/stdio-demo        (dsh-stdio-demo)
  ui/acp-agent      -> examples/acp-demo          (dsh-acp-demo)
  ui/jsonrpc-agent  -> examples/jsonrpc-demo      (dsh-jsonrpc-demo)

Update every code/config/test reference and reference-only doc mentions, and
regenerate module-graph, config-catalog, and doc-graphs. The jsonrpc bin
(dsh-jsonrpc-agent) and single-file exe (dsh-jsonrpc-agent-pkg) keep their
names; the SDK runtime-startup surface is reconciled separately.

examples/cordis-agent/composition.md

@@ -20,9 +20,9 @@ flowchart LR
   cfg --> plugin_cordis_web
   plugin_cordis_web_fetch_local["web-fetch-local<br/>@deepseek-ai/dsh-web-fetch-local"]
   cfg --> plugin_cordis_web_fetch_local
-  plugin_cordis_stdio_agent["stdio-agent<br/>@deepseek-ai/dsh-stdio-agent"]
+  plugin_cordis_stdio_agent["stdio-agent<br/>@deepseek-ai/dsh-stdio-demo"]
   cfg --> plugin_cordis_stdio_agent
-  plugin_cordis_stdio_agent --> bundle_agent_core["@deepseek-ai/dsh-agent-core"]
+  plugin_cordis_stdio_agent --> bundle_agent_core["@deepseek-ai/dsh-agent-spine-demo"]
   plugin_cordis_stdio_agent --> bundle_jsonl["@deepseek-ai/dsh-session-persistence-jsonl"]
   plugin_cordis_stdio_agent --> frontdoor_stdio["readline UI<br/>console logger<br/>pre-created main agent"]
   bundle_agent_core --> spine_llm["ctx.llm"]
@@ -41,7 +41,7 @@ flowchart LR
 | `fs-local` | `@deepseek-ai/dsh-fs-local` |
 | `web` | `@deepseek-ai/dsh-web` |
 | `web-fetch-local` | `@deepseek-ai/dsh-web-fetch-local` |
-| `stdio-agent` | `@deepseek-ai/dsh-stdio-agent` |
+| `stdio-agent` | `@deepseek-ai/dsh-stdio-demo` |
 | `tool-cordis` | `@deepseek-ai/dsh-tool-cordis` |
 
 Source config: [`examples/cordis-agent/cordis.yml`](cordis.yml).

examples/cordis-agent/cordis.yml

@@ -49,7 +49,7 @@
 
 # The app bundle pre-creates the self-referential demo's `main` agent.
 - id: stdio-agent
-  name: '@deepseek-ai/dsh-stdio-agent'
+  name: '@deepseek-ai/dsh-stdio-demo'
   config:
     model: deepseek-v4-flash
     resumeSessionId: !!js process.env.RESUME_SESSION_ID

examples/cordis-agent/tests/keyless-smoke.e2e.ts

@@ -8,7 +8,7 @@ import { LOADER_SMOKE_TEST_TIMEOUT_MS, runLoaderSmoke } from '@deepseek-ai/dsh-l
  * prompt and assert the banner. The dummy key never reaches a model call.
  */
 
-const binScript = fileURLToPath(new URL('../../../packages/ui/stdio-agent/src/bin.ts', import.meta.url))
+const binScript = fileURLToPath(new URL('../../../packages/examples/stdio-demo/src/bin.ts', import.meta.url))
 const configPath = fileURLToPath(new URL('../cordis.yml', import.meta.url))
 const tsconfigPath = fileURLToPath(new URL('../../../tsconfig.json', import.meta.url))