docs: fix confusing UNIVERSAL vs multi-platform examples - Basic curl walkthrough now uses gradle/UNIVERSAL instead of java/LINUX_X64 - Renamed 'Example Workflow' to 'Universal Releases' with a Gradle example - Clarified 'Multi-Platform Releases' section (e.g. Java) as the contrasting case - Updated delete/tag examples and the sdkman-release-action preview for consistency
Add section on upcoming sdkman-release-action integration
Replace em-dashes with hyphens
Update examples to use Java/Temurin, remove platforms table
Add Vendor API Integration Guide