Prerelease 0.7.2-alpha1 (#278)

## Motivation and Context
- test new publish plugin
- add package.kt to kotlin-sdk umbrella module to resolve klib
generation errors during Maven publishing


## Breaking Changes
no

## Types of changes
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

gradle/libs.versions.toml

@@ -20,7 +20,7 @@ kotest = "6.0.3"
 awaitility = "4.3.0"
 
 # Samples
-mcp-kotlin = "0.7.2-SNAPSHOT"
+mcp-kotlin = "0.7.2-alpha1"
 anthropic = "2.7.0"
 shadow = "8.1.1"