feat(config): add drop property index operation

Author: bevzzz

src/main/java/io/weaviate/client6/v1/api/collections/config/DeletePropertyIndexRequest.java

@@ -0,0 +1,14 @@
+package io.weaviate.client6.v1.api.collections.config;
+
+import java.util.Collections;
+
+import io.weaviate.client6.v1.internal.rest.Endpoint;
+import io.weaviate.client6.v1.internal.rest.SimpleEndpoint;
+
+public record DeletePropertyIndexRequest(String collectionName, String propertyName, PropertyIndexType indexType) {
+  public static final Endpoint<DeletePropertyIndexRequest, Void> _ENDPOINT = SimpleEndpoint.sideEffect(
+      request -> "DELETE",
+      request -> "/schema/" + request.collectionName + "/properties/" + request.propertyName + "/index/"
+          + request.indexType.toString(),
+      request -> Collections.emptyMap());
+}

src/main/java/io/weaviate/client6/v1/api/collections/config/PropertyIndexType.java

@@ -0,0 +1,17 @@
+package io.weaviate.client6.v1.api.collections.config;
+
+public enum PropertyIndexType {
+  FILTERABLE("filterable"),
+  SEARCHABLE("searchable"),
+  RANGE_FILTERS("rangeFilters");
+
+  private final String value;
+
+  private PropertyIndexType(String value) {
+    this.value = value;
+  }
+
+  public String toString() {
+    return value;
+  }
+}

src/main/java/io/weaviate/client6/v1/api/collections/config/WeaviateConfigClient.java

@@ -52,6 +52,12 @@ public void addProperty(Property property) throws IOException {
         AddPropertyRequest._ENDPOINT);
   }
 
+  public void dropPropertyIndex(String propertyName, PropertyIndexType indexType) throws IOException {
+    this.restTransport.performRequest(
+        new DeletePropertyIndexRequest(collection.collectionName(), propertyName, indexType),
+        DeletePropertyIndexRequest._ENDPOINT);
+  }
+
   public void addReference(String propertyName, String... dataTypes) throws IOException {
     this.addProperty(ReferenceProperty.to(propertyName, dataTypes).toProperty());
   }

src/main/java/io/weaviate/client6/v1/api/collections/config/WeaviateConfigClientAsync.java

@@ -53,6 +53,12 @@ public CompletableFuture<Void> addProperty(Property property) throws IOException
         AddPropertyRequest._ENDPOINT);
   }
 
+  public CompletableFuture<Void> dropPropertyIndex(String propertyName, PropertyIndexType indexType) {
+    return this.restTransport.performRequestAsync(
+        new DeletePropertyIndexRequest(collection.collectionName(), propertyName, indexType),
+        DeletePropertyIndexRequest._ENDPOINT);
+  }
+
   public CompletableFuture<Void> addReference(String name, String... dataTypes) throws IOException {
     return this.addProperty(ReferenceProperty.to(name, dataTypes).toProperty());
   }