Bump version to 1.3.2 and refactor nullable handling across core files

[temonk]

No description provided.

[Copilot]

Pull Request Overview

This PR bumps the package version and enhances nullable handling by refactoring how implicit conversion operators and nullability annotations are generated across core files, as well as cleaning up and reformatting related helper and extension code.

• Bumped project version to 1.3.2.
• Replaced non-nullable implicit conversions with nullable overloads decorated with NotNullIfNotNull.
• Moved and adjusted [DisallowNull] placement and cleaned up deprecated/commented code.

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
Directory.Build.props	Updated <Version> from 1.3.1 to 1.3.2
src/AltaSoft.Choice.Generator/Executor.cs	Refactored generation of implicit operators to nullable overloads and repositioned [DisallowNull]
src/AltaSoft.Choice.Generator/Helpers/SourceCodeBuilder.cs	Merged else and if into else if for header-line handling
src/AltaSoft.Choice.Generator/Extensions/RoslynExt.cs	Removed obsolete commented-out extension methods
src/AltaSoft.Choice.Generator/Extensions/CompilationExt.cs	Wrapped GetFullName in #pragma warning disable S1643/restore block
tests/AltaSoft.Choice.Generator.SnapshotTests/Snapshots/...Authorisation1Choice*.verified.cs	Regenerated snapshots to reflect nullable implicit operator changes
tests/AltaSoft.ChoiceGenerator.Tests/ChoiceGeneratorTests.cs	Added trailing newline

Comments suppressed due to low confidence (3)

src/AltaSoft.Choice.Generator/Executor.cs:114

• The generator now only emits nullable implicit operators and removes the original non-nullable overload, which is a breaking change; consider retaining both a non-nullable operator (for backward compatibility) and the new nullable overload.

                sb.AppendLine("[DisallowNull]");

tests/AltaSoft.ChoiceGenerator.Tests/ChoiceGeneratorTests.cs:301

• Add unit tests for the new nullable implicit operators, specifically scenarios where the input is null, to verify that the operator returns null as expected.

    }

src/AltaSoft.Choice.Generator/Executor.cs:110

• [DisallowNull] is only applied in the else branch and omitted for DateOnly properties; you may want to add [DisallowNull] after XmlIgnore to ensure consistent null-disallow behavior for all generated properties.

                sb.AppendLine("[XmlIgnore]");