style: move inline imports to top-level import statements

- Move package management imports from method bodies to file headers
- Fix Groovy compilation errors caused by inline import statements
- Ensure consistent import organization across all files

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

Co-Authored-By: Claude <[email protected]>
Signed-off-by: Edmund Miller <[email protected]>

Author: edmundmiller

modules/nextflow/src/main/groovy/nextflow/executor/BashWrapperBuilder.groovy

@@ -41,6 +41,8 @@ import nextflow.secret.SecretsLoader
 import nextflow.util.Escape
 import nextflow.util.MemoryUnit
 import nextflow.util.TestOnly
+import nextflow.packages.PackageManager
+import nextflow.Global
 /**
  * Builder to create the Bash script which is used to
  * wrap and launch the user task
@@ -586,9 +588,6 @@ class BashWrapperBuilder {
     }
 
     private String getPackageActivateSnippet() {
-        import nextflow.packages.PackageManager
-        import nextflow.Global
-        
         if (!packageSpec || !PackageManager.isEnabled(Global.session))
             return null
 

plugins/nf-wave/src/main/io/seqera/wave/plugin/WaveClient.groovy

@@ -75,6 +75,8 @@ import nextflow.util.Threads
 import org.slf4j.Logger
 import org.slf4j.LoggerFactory
 import static nextflow.util.SysHelper.DEFAULT_DOCKER_PLATFORM
+import nextflow.packages.PackageManager
+import nextflow.packages.PackageSpec
 
 /**
  * Wave client service
@@ -562,9 +564,6 @@ class WaveClient {
          * to assemble the target container
          */
         if( attrs.package && !packagesSpec ) {
-            import nextflow.packages.PackageManager
-            import nextflow.packages.PackageSpec
-            
             if( containerScript )
                 throw new IllegalArgumentException("Unexpected package and $scriptType conflict while resolving wave container")