add examples for annotations

Examples/src/main/java/com/groupdocs/annotation/examples/basic_usage/add_annotation_to_the_document/AddImageAnnotation.java

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+package com.groupdocs.annotation.examples.basic_usage.add_annotation_to_the_document;
+
+import com.groupdocs.annotation.Annotator;
+import com.groupdocs.annotation.examples.Constants;
+import com.groupdocs.annotation.models.Rectangle;
+import com.groupdocs.annotation.models.annotationmodels.ImageAnnotation;
+
+public class AddImageAnnotation {
+    public static void run() {
+        try(final Annotator annotator = new Annotator(Constants.INPUT_PDF)){
+            ImageAnnotation imageAnnotation = new ImageAnnotation();
+            imageAnnotation.setBox(new Rectangle(100, 100, 100, 100));
+            imageAnnotation.setOpacity(0.7);
+            imageAnnotation.setPageNumber(0);
+            imageAnnotation.setImagePath("www.google.com.ua/images/branding/googlelogo/2x/googlelogo_color_92x30dp.png");
+            imageAnnotation.setAngle(100.);
+            annotator.add(imageAnnotation);
+            annotator.save("result_image_annotation.pdf");
+        }
+    }
+}

Examples/src/main/java/com/groupdocs/annotation/examples/basic_usage/add_annotation_to_the_document/AddSearchTextAnnotation.java

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+package com.groupdocs.annotation.examples.basic_usage.add_annotation_to_the_document;
+
+import com.groupdocs.annotation.Annotator;
+import com.groupdocs.annotation.examples.Constants;
+import com.groupdocs.annotation.models.annotationmodels.SearchTextFragment;
+
+public class AddSearchTextAnnotation {
+    public static void run() {
+        try(final Annotator annotator = new Annotator(Constants.INPUT_PDF)){
+            SearchTextFragment searchTextFragment = new SearchTextFragment();
+            searchTextFragment.setText("Welcome to GroupDocs");//If the document does not contain this text, nothing will be highlighted
+            searchTextFragment.setFontSize(10.);
+            searchTextFragment.setFontFamily("Calibri");
+            searchTextFragment.setFontColor(65535);
+            searchTextFragment.setBackgroundColor(16761035);
+            annotator.add(searchTextFragment);
+            annotator.save("result_add_search_text.pdf");
+        }
+    }
+}

Examples/src/main/java/com/groupdocs/annotation/examples/basic_usage/add_annotation_to_the_document/AddSquigglyAnnotation.java

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+package com.groupdocs.annotation.examples.basic_usage.add_annotation_to_the_document;
+
+import com.groupdocs.annotation.Annotator;
+import com.groupdocs.annotation.examples.Constants;
+import com.groupdocs.annotation.models.Point;
+import com.groupdocs.annotation.models.Reply;
+import com.groupdocs.annotation.models.annotationmodels.SquigglyAnnotation;
+
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+public class AddSquigglyAnnotation {
+    public static void run() {
+        try(final Annotator annotator = new Annotator(Constants.INPUT_PDF)){
+            SquigglyAnnotation squigglyAnnotation = new SquigglyAnnotation();
+            squigglyAnnotation.setCreatedOn(new Date());
+            squigglyAnnotation.setFontColor(65535);
+            squigglyAnnotation.setBackgroundColor(16761035);
+            squigglyAnnotation.setMessage("This is squiggly annotation");
+            squigglyAnnotation.setOpacity(0.7);
+            squigglyAnnotation.setPageNumber(0);
+            squigglyAnnotation.setSquigglyColor(1422623);//Supported only Word and PDF
+            List points = new ArrayList<Point>();
+            points.add(new Point(80, 730));
+            points.add(new Point(240, 730));
+            points.add(new Point(80, 650));
+            points.add(new Point(240, 650));
+
+            Reply reply1 = new Reply();
+            reply1.setComment("First comment");
+            reply1.setRepliedOn(new Date());
+
+            Reply reply2 = new Reply();
+            reply2.setComment("Second comment");
+            reply2.setRepliedOn(new Date());
+
+            List<Reply> replies = new ArrayList<>();
+            replies.add(reply1);
+            replies.add(reply2);
+
+            squigglyAnnotation.setReplies(replies);
+
+            annotator.add(squigglyAnnotation);
+            annotator.save("result_squiggly_annotation.pdf");
+        }
+    }
+}