fix: Resolve maven-resources-plugin validation warning

- Update maven-resources-plugin from 3.3.0 (implicit) to 3.5.0 (explicit)
- Fixes Maven warning about deprecated Plexus Container Contextualizable interface
- Plugin 3.5.0 released March 2, 2026, removes EOL dependencies

Maven validation warning resolved:
  Before: "Implements `Contextualizable` interface from Plexus Container, which is EOL."
  After: No warnings - clean build

Note: jcurses 1.27 requires Java --enable-preview flag:
  - jnexus-ui.sh launcher already includes --enable-preview
  - Direct java -jar execution requires manual --enable-preview flag
  - This is because jcurses 1.27 uses Java preview features (class file version 65.65535)

Source: https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-resources-plugin/3.5.0

Author: Flossy

pom.xml

@@ -124,6 +124,13 @@
                 </configuration>
             </plugin>
 
+            <!-- Resources Plugin -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-resources-plugin</artifactId>
+                <version>3.5.0</version>
+            </plugin>
+
             <!-- Build Helper Plugin -->
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>