formattingand autowired constructors (#2557)

# Description
This pull request includes several changes aimed at improving the code
structure and removing redundant code. The most significant changes
involve reordering methods, removing unnecessary annotations, and
refactoring constructors to use dependency injection.
Autowired now comes via constructor (which also doesn't need autowired
annotation as its done by default for configuration)



## Checklist

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have performed a self-review of my own code
- [ ] I have attached images of the change if it is UI based
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] If my code has heavily changed functionality I have updated
relevant docs on [Stirling-PDFs doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
- [ ] My changes generate no new warnings
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

src/main/java/stirling/software/SPDF/config/ExternalAppDepConfig.java

@@ -6,7 +6,6 @@ import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
 
-import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Configuration;
 
 import jakarta.annotation.PostConstruct;
@@ -15,7 +14,24 @@ import lombok.extern.slf4j.Slf4j;
 @Configuration
 @Slf4j
 public class ExternalAppDepConfig {
-    @Autowired private EndpointConfiguration endpointConfiguration;
+
+    private final EndpointConfiguration endpointConfiguration;
+    private final Map<String, List<String>> commandToGroupMapping =
+            new HashMap<>() {
+
+                {
+                    put("soffice", List.of("LibreOffice"));
+                    put("weasyprint", List.of("Weasyprint"));
+                    put("pdftohtml", List.of("Pdftohtml"));
+                    put("unoconv", List.of("Unoconv"));
+                    put("qpdf", List.of("qpdf"));
+                    put("tesseract", List.of("tesseract"));
+                }
+            };
+
+    public ExternalAppDepConfig(EndpointConfiguration endpointConfiguration) {
+        this.endpointConfiguration = endpointConfiguration;
+    }
 
     private boolean isCommandAvailable(String command) {
         try {
@@ -34,18 +50,6 @@ public class ExternalAppDepConfig {
         }
     }
 
-    private final Map<String, List<String>> commandToGroupMapping =
-            new HashMap<>() {
-                {
-                    put("soffice", List.of("LibreOffice"));
-                    put("weasyprint", List.of("Weasyprint"));
-                    put("pdftohtml", List.of("Pdftohtml"));
-                    put("unoconv", List.of("Unoconv"));
-                    put("qpdf", List.of("qpdf"));
-                    put("tesseract", List.of("tesseract"));
-                }
-            };
-
     private List<String> getAffectedFeatures(String group) {
         return endpointConfiguration.getEndpointsForGroup(group).stream()
                 .map(endpoint -> formatEndpointAsFeature(endpoint))
@@ -55,7 +59,6 @@ public class ExternalAppDepConfig {
     private String formatEndpointAsFeature(String endpoint) {
         // First replace common terms
         String feature = endpoint.replace("-", " ").replace("pdf", "PDF").replace("img", "image");
-
         // Split into words and capitalize each word
         return Arrays.stream(feature.split("\\s+"))
                 .map(word -> capitalizeWord(word))
@@ -76,7 +79,6 @@ public class ExternalAppDepConfig {
         boolean isAvailable = isCommandAvailable(command);
         if (!isAvailable) {
             List<String> affectedGroups = commandToGroupMapping.get(command);
-
             if (affectedGroups != null) {
                 for (String group : affectedGroups) {
                     List<String> affectedFeatures = getAffectedFeatures(group);
@@ -95,7 +97,6 @@ public class ExternalAppDepConfig {
 
     @PostConstruct
     public void checkDependencies() {
-
         // Check core dependencies
         checkDependencyAndDisableGroup("tesseract");
         checkDependencyAndDisableGroup("soffice");
@@ -103,13 +104,11 @@ public class ExternalAppDepConfig {
         checkDependencyAndDisableGroup("weasyprint");
         checkDependencyAndDisableGroup("pdftohtml");
         checkDependencyAndDisableGroup("unoconv");
-
         // Special handling for Python/OpenCV dependencies
         boolean pythonAvailable = isCommandAvailable("python3") || isCommandAvailable("python");
         if (!pythonAvailable) {
             List<String> pythonFeatures = getAffectedFeatures("Python");
             List<String> openCVFeatures = getAffectedFeatures("OpenCV");
-
             endpointConfiguration.disableGroup("Python");
             endpointConfiguration.disableGroup("OpenCV");
             log.warn(