Remove cloud-specific classes in favor of jcloudstorage library

This is a clean break migration from embedded cloud provider classes
to the new standalone jcloudstorage library.

Changes:
- Removed org.flossware.jclassloader.cloud package and all cloud provider classes
  (S3ClassSource, AzureBlobClassSource, GcsClassSource, GoogleDriveClassSource,
   DropboxClassSource, OneDriveClassSource)
- Removed cloud SDK dependencies from pom.xml (AWS S3, Azure Blob, GCS, etc.)
- Removed JClassLoader.Builder methods: addS3Source(), addAzureBlobSource(),
  addGcsSource(), addGoogleDriveSource(), addDropboxSource(), addOneDriveSource()
- Removed CloudStorageExamples.java (users should refer to jcloudstorage README)
- Removed all cloud-specific test files

Users should migrate to:
- jcloudstorage library (org.flossware:jcloudstorage:1.0)
- CloudStorageClassSource adapter
- JClassLoader.Builder.addCloudStorage(CloudStorageClient)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: Flossy

pom.xml

@@ -90,60 +90,6 @@
             <optional>true</optional>
         </dependency>
 
-        <!-- AWS S3 Support -->
-        <dependency>
-            <groupId>software.amazon.awssdk</groupId>
-            <artifactId>s3</artifactId>
-            <version>2.44.12</version>
-            <optional>true</optional>
-        </dependency>
-
-        <!-- Azure Blob Storage Support -->
-        <dependency>
-            <groupId>com.azure</groupId>
-            <artifactId>azure-storage-blob</artifactId>
-            <version>12.34.0</version>
-            <optional>true</optional>
-        </dependency>
-
-        <!-- Google Cloud Storage Support -->
-        <dependency>
-            <groupId>com.google.cloud</groupId>
-            <artifactId>google-cloud-storage</artifactId>
-            <version>2.68.0</version>
-            <optional>true</optional>
-        </dependency>
-
-        <!-- Google Drive API Support -->
-        <dependency>
-            <groupId>com.google.apis</groupId>
-            <artifactId>google-api-services-drive</artifactId>
-            <version>v3-rev20260428-2.0.0</version>
-            <optional>true</optional>
-        </dependency>
-        <dependency>
-            <groupId>com.google.auth</groupId>
-            <artifactId>google-auth-library-oauth2-http</artifactId>
-            <version>1.47.0</version>
-            <optional>true</optional>
-        </dependency>
-
-        <!-- Dropbox SDK Support -->
-        <dependency>
-            <groupId>com.dropbox.core</groupId>
-            <artifactId>dropbox-core-sdk</artifactId>
-            <version>7.0.0</version>
-            <optional>true</optional>
-        </dependency>
-
-        <!-- Microsoft Graph (OneDrive) Support -->
-        <dependency>
-            <groupId>com.microsoft.graph</groupId>
-            <artifactId>microsoft-graph</artifactId>
-            <version>6.65.0</version>
-            <optional>true</optional>
-        </dependency>
-
         <!-- Apache Kafka Support -->
         <dependency>
             <groupId>org.apache.kafka</groupId>

src/main/java/org/flossware/jclassloader/JClassLoader.java

@@ -470,30 +470,6 @@ public Builder addCloudStorage(org.flossware.cloud.storage.CloudStorageClient cl
             return addClassSource(new CloudStorageClassSource(client));
         }
 
-        public Builder addS3Source(org.flossware.jclassloader.cloud.S3ClassSource source) {
-            return addClassSource(source);
-        }
-
-        public Builder addAzureBlobSource(org.flossware.jclassloader.cloud.AzureBlobClassSource source) {
-            return addClassSource(source);
-        }
-
-        public Builder addGcsSource(org.flossware.jclassloader.cloud.GcsClassSource source) {
-            return addClassSource(source);
-        }
-
-        public Builder addGoogleDriveSource(org.flossware.jclassloader.cloud.GoogleDriveClassSource source) {
-            return addClassSource(source);
-        }
-
-        public Builder addDropboxSource(org.flossware.jclassloader.cloud.DropboxClassSource source) {
-            return addClassSource(source);
-        }
-
-        public Builder addOneDriveSource(org.flossware.jclassloader.cloud.OneDriveClassSource source) {
-            return addClassSource(source);
-        }
-
         public Builder cache(ClassCache cache) {
             this.cache = cache;
             return this;