refactor(create-rslib): layer template tsconfigs by scope

[elecmonkey]

Summary

Unify the TS template tsconfigs on one shape, modeled on create-rstack.

• Same option order and /* modules */ / /* type checking */ grouping in every
  root, filling in the missing target, moduleDetection,
  allowImportingTsExtensions, noUnusedLocals and noUnusedParameters.
• Every root is include: ["src"]; template-svelte-ts no longer pulls in
  scripts and *.config.ts.
• Every tests/ gets a tsconfig extending the root with rootDir: ".." and
  include: ["./"] — template-node-ts and template-svelte-ts had none. Config
  and setup files are no longer covered by any tsconfig.
• Emit options are aligned across the two roots that emit declarations:
  template-svelte-ts gains the outDir: "dist" it was missing, and the test
  configs of both override noEmit.
• types: component roots stay browser-only (svelte's ["node"] becomes
  ["@rslib/core/types", "svelte"]), test configs add node. @types/node is
  added to the React, Solid and Vue templates, at the version the other templates
  already pin.
• Rspress no longer overwrites the generated root config:
  template-rspress/react-ts/tsconfig.json is removed and its paths
  self-reference moves to docs/tsconfig.json, with src/index.ts and the
  placeholder test updated.

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