chore: Bump version to 1.0.0-beta.7 for extension point support

Updated version to reflect new extension point interfaces that enable
standalone plugin development with compile-time access to Nextflow
extension points.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: edmundmiller

VERSION

@@ -1 +1 @@
-1.0.0-beta.5
+1.0.0-beta.6

build.gradle

@@ -18,6 +18,7 @@ dependencies {
     implementation 'com.google.code.gson:gson:2.10.1'
     implementation 'org.apache.httpcomponents:httpclient:4.5.14'
     implementation 'org.apache.httpcomponents:httpmime:4.5.14'
+    implementation 'org.pf4j:pf4j:3.9.0'
 
     testImplementation('org.spockframework:spock-core:2.3-groovy-3.0')
     testImplementation 'org.wiremock:wiremock:3.5.4'