Add nf-amazon plugin for direct S3/MinIO access

WES does not stage S3 input files to the Nextflow workdir.
Adding nf-amazon plugin so Channel.of(file(params.pdb)) can
resolve s3:// paths directly from MinIO without WES staging.

nextflow.config

@@ -8,6 +8,18 @@ manifest {
     version = '1.0.0'
 }
 
+// S3/MinIO plugin for direct S3 access
+plugins {
+    id 'nf-amazon'
+}
+
+aws {
+    client {
+        endpoint = 'http://datalake-hl.datalake.svc.cluster.local:9000'
+        s3PathStyleAccess = true
+    }
+}
+
 // Global default parameters
 params {
     pdb = null