feat: Add Lombok @Getter and @Setter annotations to reduce boilerplate code in multiple classes (#4321)

# Description of Changes

Update classes across the codebase to use Lombok's `@Getter` and
`@Setter` annotations, replacing manually written getter and setter
methods. This change streamlines the code, reduces boilerplate, and
improves maintainability.

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Please provide a summary of the changes, including:

- What was changed
- Why the change was made
- Any challenges encountered

Closes #(issue_number)
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---

## Checklist

### General

- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [x] I have performed a self-review of my own code
- [x] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [x] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

---------

Signed-off-by: Balázs Szücs <bszucs1209@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

app/common/src/main/java/stirling/software/common/util/ProcessExecutor.java

@@ -15,6 +15,8 @@ import java.util.concurrent.TimeUnit;
 
 import io.github.pixee.security.BoundedLineReader;
 
+import lombok.Getter;
+import lombok.Setter;
 import lombok.extern.slf4j.Slf4j;
 
 import stirling.software.common.model.ApplicationProperties;
@@ -303,6 +305,8 @@ public class ProcessExecutor {
         OCR_MY_PDF
     }
 
+    @Setter
+    @Getter
     public class ProcessExecutorResult {
         int rc;
         String messages;
@@ -312,20 +316,5 @@ public class ProcessExecutor {
             this.messages = messages;
         }
 
-        public int getRc() {
-            return rc;
-        }
-
-        public void setRc(int rc) {
-            this.rc = rc;
-        }
-
-        public String getMessages() {
-            return messages;
-        }
-
-        public void setMessages(String messages) {
-            this.messages = messages;
-        }
     }
 }

app/common/src/main/java/stirling/software/common/util/TempFile.java

@@ -4,6 +4,7 @@ import java.io.File;
 import java.io.IOException;
 import java.nio.file.Path;
 
+import lombok.Getter;
 import lombok.extern.slf4j.Slf4j;
 
 /**
@@ -14,6 +15,7 @@ import lombok.extern.slf4j.Slf4j;
 public class TempFile implements AutoCloseable {
 
     private final TempFileManager manager;
+    @Getter
     private final File file;
 
     public TempFile(TempFileManager manager, String suffix) throws IOException {
@@ -21,10 +23,6 @@ public class TempFile implements AutoCloseable {
         this.file = manager.createTempFile(suffix);
     }
 
-    public File getFile() {
-        return file;
-    }
-
     public Path getPath() {
         return file.toPath();
     }

app/common/src/main/java/stirling/software/common/util/TempFileRegistry.java

@@ -11,6 +11,7 @@ import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
 import java.util.stream.Collectors;
 
+import lombok.Getter;
 import org.springframework.stereotype.Component;
 
 import lombok.extern.slf4j.Slf4j;
@@ -24,8 +25,22 @@ import lombok.extern.slf4j.Slf4j;
 public class TempFileRegistry {
 
     private final ConcurrentMap<Path, Instant> registeredFiles = new ConcurrentHashMap<>();
+    /**
+     * -- GETTER --
+     *  Get all registered third-party temporary files.
+     *
+     * @return Set of third-party file paths
+     */
+    @Getter
     private final Set<Path> thirdPartyTempFiles =
             Collections.newSetFromMap(new ConcurrentHashMap<>());
+    /**
+     * -- GETTER --
+     *  Get all registered temporary directories.
+     *
+     * @return Set of temporary directory paths
+     */
+    @Getter
     private final Set<Path> tempDirectories = Collections.newSetFromMap(new ConcurrentHashMap<>());
 
     /**
@@ -133,24 +148,6 @@ public class TempFileRegistry {
                 .collect(Collectors.toSet());
     }
 
-    /**
-     * Get all registered third-party temporary files.
-     *
-     * @return Set of third-party file paths
-     */
-    public Set<Path> getThirdPartyTempFiles() {
-        return thirdPartyTempFiles;
-    }
-
-    /**
-     * Get all registered temporary directories.
-     *
-     * @return Set of temporary directory paths
-     */
-    public Set<Path> getTempDirectories() {
-        return tempDirectories;
-    }
-
     /**
      * Check if a file is registered in the registry.
      *