feat: Support parse extended json5 syntax

[b41sh]

This pull request introduces support for JSON5 syntax when parsing JSON data into the JSONB format. This enhancement provides a more flexible and developer-friendly way to represent JSON data.

Key features included in this PR:

• Hexadecimal Numbers: Support for hexadecimal number representation, including both integer and floating-point formats (e.g., 0xabc, 0X123.56).
• NaN and Infinity: Parsing support for NaN (Not a Number) and Infinity values, aligning with JSON5 specifications.
• Single-Quoted Strings: Strings can now be enclosed in single quotes (e.g., 'abcd').
• Unquoted Object Keys: Object keys are now allowed without quotes (e.g., { key: "value" }).
• Case-Insensitive Boolean and Null: The parser now supports case-insensitive parsing of null, true, and false values (e.g., NULL, True, False).
• Empty String to Null: An empty string is now parsed as null.

This enhancement improves the usability and compatibility of JSONB, making it easier to work with various JSON data sources.