tsconfig

Add a tsconfig.json with these settings:

{
  "compilerOptions": {
    "target": "ES2020",
    "module": "ESNext",
    "moduleResolution": "bundler",
    "strict": true,
    "noEmit": true,
    "types": ["chrome", "vitest/globals"],
    "lib": ["ES2020", "DOM", "DOM.Iterable"]
  },
  "include": ["src"]
}

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