Add explicit Prettier override for .cjs files to enforce double-quote normalization

[Copilot]

Prettier configuration lacked explicit rules for .cjs files, making string quoting normalization implicit rather than declared.

Changes

• Added *.cjs override to both .prettierrc.json files with explicit "singleQuote": false
• Ensures consistent double-quote usage in require() statements and string literals across all CommonJS modules

Configuration

{
"overrides": [
{
"files": "*.cjs",
"options": {
"singleQuote": false
}
}
]
}

This makes the string quoting policy explicit and self-documenting for contributors working with CommonJS modules.

Original prompt

Update prettier configuration to normalize string quoting in .cjs sources, specially in requires calls.

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