Better CSV example in README.md

[liuzicheng1987]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @liuzicheng1987, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refines the CSV example presented in the README.md file. The changes aim to improve the clarity and correctness of the example by explicitly defining the data structure used and standardizing the CSV output format.

Highlights

• Updated CSV Example Structure: The README.md now includes an explicit Person struct definition for the CSV example, making the data structure clearer and more self-contained.
• Standardized CSV Delimiter: The CSV example output in README.md has been updated to use commas (",") as delimiters instead of semicolons (";"), aligning with standard CSV format.
• rfl/csv.hpp Inclusion: The example now explicitly includes <rfl/csv.hpp>, clarifying the dependency for CSV operations.

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[gemini-code-assist]

Code Review

This pull request aims to improve the CSV example in the README.md file. However, the changes introduce a compilation error in the C++ code snippet and an inconsistency in the example CSV output. My review includes specific suggestions to fix these issues to ensure the example is correct and clear for users.

[gemini-code-assist]

The Person struct is missing the birthday field, but it's being used to initialize Person objects on lines 264-279. This will cause a compilation error. Based on other examples in this file and the CSV output, you should add a birthday field.

Suggested change

	struct Person {
	std::string first_name;
	std::string last_name = "Simpson";
	std::string town = "Springfield";
	int age;
	rfl::Email email;
	};
	struct Person {
	std::string first_name;
	std::string last_name = "Simpson";
	std::string town = "Springfield";
	rfl::Timestamp<"%Y-%m-%d"> birthday;
	int age;
	rfl::Email email;
	};