feat: serverLauncher to successfully start the Node.js server

[stone-lyl]

• Compare the running structure of ds-ext before and after adding the node process

Before	After
❌	✅

• It has successfully handled reading and writing of a large CSV file with 600,000 rows, and it remains stable even when adding node diagrams like Map.

nodejs-process.mp4

• I have tested both playground and playground-node, and they run smoothly.
• How to start the new socket server, please click here

---

todo：

1. Customize the server startup command.
2. Currently, all diagrams' runtime data are stored in a single execution.db or execution.json file, with only the latest run record kept per diagram.

• The handling of DuckDB remains the same as before.
• I'm unsure about the JSON processing ?

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
data-story-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 21, 2025 2:58am

[stone-lyl]

This is a security mechanism that allows users to preview the actions to be performed without actually executing them.

[stone-lyl]

Used to define configurable options for extensions, for example:

{
  "datastory.additionalDsServerCliArgs": [
    "--max-old-space-size=4096",
  ]
}