Add versionRange to OpenSearch plugin to allow plugins to specify a range of core versions for compatibility

buildSrc/src/main/groovy/org/opensearch/gradle/plugin/PluginBuildPlugin.groovy

@@ -107,6 +107,7 @@ class PluginBuildPlugin implements Plugin<Project> {
                     'name'                : extension1.name,
                     'description'         : extension1.description,
                     'version'             : extension1.version,
+                    'dependencies'        : extension1.versionRange ? "{ opensearch: \"${extension1.versionRange}\" }" : "{}",
                     'opensearchVersion'   : Version.fromString(VersionProperties.getOpenSearch()).toString(),
                     'javaVersion'         : java.targetCompatibility as String,
                     'classname'           : extension1.classname,

buildSrc/src/main/java/org/opensearch/gradle/plugin/PluginPropertiesExtension.java

@@ -47,6 +47,12 @@ public class PluginPropertiesExtension {
 
     private String version;
 
+    /**
+     * Optional semver-like range string (e.g., "~2.12.0", "^2.13.0", ">=2.12.0 <2.14.0", etc.)
+     * This will be expanded into plugin-descriptor.properties as 'dependencies'.
+     */
+    private String versionRange;
+
     private String description;
 
     private String classname;
@@ -102,6 +108,14 @@ public void setVersion(String version) {
         this.version = version;
     }
 
+    public String getVersionRange() {
+        return versionRange;
+    }
+
+    public void setVersionRange(String versionRange) {
+        this.versionRange = versionRange;
+    }
+
     public String getDescription() {
         return description;
     }
@@ -171,4 +185,36 @@ public boolean isHasClientJar() {
     public void setHasClientJar(boolean hasClientJar) {
         this.hasClientJar = hasClientJar;
     }
+
+    @Override
+    public String toString() {
+        return "PluginPropertiesExtension{"
+            + "name='"
+            + getName()
+            + "'"
+            + ", version='"
+            + getVersion()
+            + "'"
+            + ", versionRange='"
+            + versionRange
+            + "'"
+            + ", description='"
+            + description
+            + "'"
+            + ", classname='"
+            + classname
+            + "'"
+            + ", customFolderName='"
+            + customFolderName
+            + "'"
+            + ", extendedPlugins="
+            + extendedPlugins
+            + ", hasNativeController="
+            + hasNativeController
+            + ", requiresKeystore="
+            + requiresKeystore
+            + ", hasClientJar="
+            + hasClientJar
+            + "}";
+    }
 }

buildSrc/src/main/resources/plugin-descriptor.properties

@@ -59,3 +59,5 @@ extended.plugins=${extendedPlugins}
 #
 # 'has.native.controller': whether or not the plugin has a native controller
 has.native.controller=${hasNativeController}
+
+dependencies=${dependencies}