fix: AddComponentModifierMacro error when using SwiftSyntax 5xx

[ElonPark]

Background (Required)

• The lexicalContext API in SwiftSyntax is only available from version 600 onwards
• The AddComponentModifierMacro was using this API without proper version checks, causing compatibility issues with SwiftSyntax 5xx versions
• This change ensures proper version compatibility by conditionally compiling the macro implementation

Changes (Required)

• AddComponentModifierMacro.swift:
  • Added conditional compilation using #if canImport(SwiftSyntax600) to wrap the implementation that uses lexicalContext
  • Returns an error message for SwiftSyntax versions below 600: "@AddComponentModifier macro requires SwiftSyntax 600.0.0 or later."
  • Removed duplicate code blocks for different SwiftSyntax versions

Testing (Required)

• Updated existing unit tests to verify macro functionality with SwiftSyntax 600+
• Added new test case to verify proper error message is shown when SwiftSyntax version is below 600
• All tests pass with both SwiftSyntax 509.x and 600+ versions
• Manual testing confirmed that:
  • The macro works correctly with SwiftSyntax 600+
  • Appropriate error message is displayed for older versions

Review Notes

• This is a compatibility fix to ensure the macro works across different SwiftSyntax versions
• The lexicalContext API provides better context information for macro expansion but is only available in newer versions
• This approach allows the library to maintain backward compatibility while leveraging newer APIs when available
• Future consideration: When minimum SwiftSyntax version is raised to 600+, the conditional compilation can be removed

[jaxtynSong]

👍 👍