Official Support TOML v1.1.0 Specification

[prozolic]

This PR changes TOML v1.1.0's features to official optional features.

#84

[Copilot]

Pull request overview

This PR officially supports the TOML v1.1.0 specification by introducing predefined TomlSpec configurations (Version100 and Version110) and reorganizing features to distinguish between official v1.1.0 features and unofficial extensions. The key change is moving AllowUnicodeInBareKeys from v1.1.0 features to unofficial extensions, aligning with the actual TOML v1.1.0 specification.

• Introduces static TomlSpec.Version100 and TomlSpec.Version110 for convenient specification selection
• Reorganizes TOML v1.1.0 features into official and unofficial categories
• Updates documentation to clearly differentiate official v1.1.0 features from unofficial extensions

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/CsToml/CsTomlSerializerOptions.cs	Adds Version100 and Version110 static properties to TomlSpec, reorganizes features into official v1.1.0 and unofficial sections with XML documentation, changes default spec to Version100
tests/CsToml.Tests/Options.cs	Updates TomlSpecVersion110 to use TomlSpec.Version110, adds new AllowUnicodeInBareKeys option for testing the unofficial extension
tests/CsToml.Tests/DefaultTest.cs	Changes Unicode bare keys test to use AllowUnicodeInBareKeys option instead of TomlSpecVersion110
tests/CsToml.Extensions.Configuration.Tests/Options.cs	Simplifies TomlSpecVersion110 to use the new TomlSpec.Version110 static property
README.md	Updates documentation to reflect official v1.1.0 support, reorganizes feature descriptions into separate sections for v1.1.0 and unofficial extensions

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[prozolic]

I plan to update TOML test-case as well, but since we found bugs during the process, so I'll fixed.