feat: add annotation option to PDF to image (#4365)

## Summary
- add optional flag to include PDF annotations when converting to images
- expose annotation option via API model and UI checkbox
- add translation for annotation option

## Testing
- `./gradlew spotlessApply`
- `./gradlew build`


------
https://chatgpt.com/codex/tasks/task_b_68b7fa1d5a1c83288342244a0ec85e9d

app/core/src/main/java/stirling/software/SPDF/controller/api/converters/ConvertImgPDFController.java

@@ -66,6 +66,7 @@ public class ConvertImgPDFController {
         String colorType = request.getColorType();
         int dpi = request.getDpi();
         String pageNumbers = request.getPageNumbers();
+        boolean includeAnnotations = Boolean.TRUE.equals(request.getIncludeAnnotations());
         Path tempFile = null;
         Path tempOutputDir = null;
         Path tempPdfPath = null;
@@ -101,7 +102,8 @@ public class ConvertImgPDFController {
                             colorTypeResult,
                             singleImage,
                             dpi,
-                            filename);
+                            filename,
+                            includeAnnotations);
             if (result == null || result.length == 0) {
                 log.error("resultant bytes for {} is null, error converting ", filename);
             }

app/core/src/main/java/stirling/software/SPDF/model/api/converters/ConvertToImageRequest.java

@@ -39,4 +39,9 @@ public class ConvertToImageRequest extends PDFWithPageNums {
             defaultValue = "300",
             requiredMode = Schema.RequiredMode.REQUIRED)
     private Integer dpi;
+
+    @Schema(
+            description = "Include annotations such as comments in the output image(s)",
+            defaultValue = "false")
+    private Boolean includeAnnotations;
 }