Add docs for new case macros

[artememelin]

Pull request checklist

• [ ] Did you bump the project version?
• [x] Did you add a description to the Pull Request?
• [x] Did you add new tests?
• [x] Did you add reviewers?

3.0.0 (22/03/2024)

Added

• Macro @serde_pascal_case to transform field names from PascalCase to snake_case for deserialization (#26).
• Macro @serde_camel_case to transform field names from camelCase to snake_case for deserialization (#26).
• Macro @serde_kebab_case to transform field names from kebab-case to snake_case for deserialization (#26).
• Serde.ser_name to override the default field name serialization (#26).
• Serde.ser_value to override the default value serialization (#26).
• Serde.ser_type to override the default type serialization (#26).
• Serde.ser_ignore_field to determine if a field should be ignored during serialization (#26).

Changed

• Renamed macro @ser_json_name to @ser_name for consistency with other serialization macros (#26).
• Renamed ignore_null to ser_ignore_null to align with serialization function naming conventions (#26).
• Renamed ignore_field to ser_ignore_field for clarity in serialization customization (#26).

[artememelin]

DOCS

https://bhftbootcamp.github.io/Serde.jl/previews/PR28/

DOCS