fix(resolve-extends): add import attribute for JSON config files

[macieklamberski]

Description

Fixes ERR_IMPORT_ATTRIBUTE_MISSING error when extending JSON configuration files in Node.js ESM environments. This issue prevents users from using JSON-based commitlint configurations that extend other configs.

I had this problem recently, also found an existing issue #3970 reporting the same problem.

Modified the dynamicImport function in @commitlint/resolve-extends to detect JSON files and add the appropriate import attribute syntax based on the Node.js version:

• Node.js < 22: Uses { assert: { type: "json" } } (import assertion syntax)
• Node.js >= 22: Uses { with: { type: "json" } } (import attribute syntax)

This ensures backward compatibility across all supported Node.js versions while using the correct syntax for each version. The distinction is important because:

• Import assertions (assert) were the initial implementation available in Node.js 16.15+
• Import attributes (with) became the standard and replaced assertions in Node.js 22+
• Node.js 22 removed support for the old assert syntax entirely

Source: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/import

Motivation and Context

When trying to extend a JSON configuration file, Node.js throws ERR_IMPORT_ATTRIBUTE_MISSING because JSON imports in ESM require import attributes to specify the module type. This affects commitlint v19+ when working with JSON config files.

Closes #3970

How Has This Been Tested?

Before Fix (Error Case)

1. Clone reproduction repository: https://github.com/macieklamberski/commitlint-json
2. Install commitlint with npm install
3. Run echo "feat: add something" | npx commitlint
4. Observe ERR_IMPORT_ATTRIBUTE_MISSING error ❌

After Fix (Working Case)

1. Clone the fix from: https://github.com/macieklamberski/commitlint

2. Build the packages: npm install && npm run build

3. Link the updated packages:

   cd commitlint/@commitlint/resolve-extends && npm link
   cd ../load && npm link

4. In the cloned example project (https://github.com/macieklamberski/commitlint-json):

   npm link @commitlint/resolve-extends
   npm link @commitlint/load

5. Run commitlint with JSON config - no error occurs ✅

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

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[JounQin]

The changes seem reasonable while I'd prefer using require() for json files personally instead of checking Node versions.

[macieklamberski]

@JounQin I have replaced previous solution with require().