feat: integrate ProjectJsonReaderWriter into ProjectRepository

Refactor `ProjectRepository` to utilize `ProjectJsonReaderWriter` for JSON-based project persistence. Load projects on initialization and write changes to JSON upon modifications.

Author: dmccoystephenson

src/main/java/com/preponderous/parpt/repo/ProjectRepository.java

@@ -8,25 +8,33 @@
 
 @Repository
 public class ProjectRepository {
-    private final List<Project> projects = new ArrayList<>();
+    private final List<Project> projects;
+    private final ProjectJsonReaderWriter projectJsonReaderWriter;
+
+    public ProjectRepository(ProjectJsonReaderWriter projectJsonReaderWriter) {
+        this.projectJsonReaderWriter = projectJsonReaderWriter;
+        this.projects = projectJsonReaderWriter.readJson();
+    }
 
     public List<Project> findAll() {
         return new ArrayList<>(projects);
     }
 
     public void clear() {
         projects.clear();
+        projectJsonReaderWriter.writeJson(projects);
     }
 
     public void add(Project project) throws NameTakenException {
         if (projects.stream().anyMatch(p -> p.getName().equals(project.getName()))) {
             throw new NameTakenException("Project with the same name already exists");
         }
         projects.add(project);
+        projectJsonReaderWriter.writeJson(projects);
     }
 
     public Project findByName(String projectName) throws ProjectNotFoundException {
-        Project retrievedProject =  projects.stream()
+        Project retrievedProject = projects.stream()
                 .filter(project -> project.getName().equals(projectName))
                 .findFirst()
                 .orElse(null);
@@ -47,4 +55,4 @@ public ProjectNotFoundException(String message) {
             super(message);
         }
     }
-}
+}