Centralize ESLint configuration to repository root

[Copilot]

Consolidates 8 scattered ESLint configuration files into a single .eslintrc.json at the repository root to enforce consistent code style across all packages and tests.

Changes

• Created root .eslintrc.json with unified rules for the entire monorepo
• Removed 7 duplicate configs from packages/*/src/.eslintrc.json
• Removed tests/.eslintrc.json (was extending non-existent parent config)
• Added override section to preserve no-console: off for test files (**/*.test.ts, **/*.spec.ts, tests/**/*.ts)
• Added jest: true to env for universal test environment support

Configuration

{
  "root": true,
  "parser": "@typescript-eslint/parser",
  "rules": {
    "@typescript-eslint/no-unused-vars": ["error", { "argsIgnorePattern": "^_" }],
    "prefer-const": "error",
    "no-console": "warn",
    "semi": ["error", "always"],
    "quotes": ["error", "single"]
  },
  "overrides": [
    {
      "files": ["tests/**/*.ts", "**/*.test.ts", "**/*.spec.ts"],
      "rules": { "no-console": "off" }
    }
  ]
}

Packages can still extend or override specific rules as needed via their own .eslintrc.json files.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Move all ESLint configuration to a centralized location at the root of the repo</issue_title>
<issue_description>We should want all packages and tests to follow the same ESLint rules. Right now, there are ESLint configuration files all over the place. We should remove them and have a single one for the entire repository. If needed each package can customize small things, but in general I'd like the repository to follow a cohesive coding style.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Move all ESLint configuration to a centralized location at the root of the repo #14

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[juliomenendez]

@copilot We need to enable a step on the CI to check the styles using ESLint. Also the ESLint should cover the entire repository.