fix: make Getting Started work for Mac OS

[Yorko]

Description

Before: Both Getting Started guides fail on macOS (Quickstart + README)

After: The guides work.

Examples:

"Find Italian restaurants near me"

"What are your hours?

The cause

By default, when TypeScript doesn't have an explicit list of types defined in samples/client/lit/shell/tsconfig.json, it scans all node_modules/@types directories up the file tree to automatically include all implicit type definitions.

If there are incomplete, missing, or broken type packages (like @types/retry or @types/trusted-types) in any parent node_modules folders (often created by other tools, parent workspaces, or global settings), TypeScript will throw TS2688 errors.

The Fix
Adding the "types": ["node"] option to the compilerOptions inside samples/client/lit/shell/tsconfig.json

Fixes #950

Pre-launch Checklist

• I signed the CLA.
• I read the Contributors Guide.
• I read the Style Guide.
• I have added updates to the CHANGELOG.
• I updated/added relevant documentation.
• My code changes (if any) have tests.
• If my branch is on fork, I have verified that scripts/e2e_test.sh passes.

If you need help, consider asking for advice on the discussion board.

[gemini-code-assist]

Code Review

This pull request adds Node.js types to the tsconfig.json of a client-side Lit application. The reviewer correctly noted that including Node.js types in a browser-based environment is unnecessary and can lead to global namespace pollution and type conflicts with standard web APIs. They suggested using an empty array instead to prevent these issues.

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