feat: update certificate handling and project management features

- Refactored CertificateHistory component to display dynamic certificate images.
- Modified CertificateNotAvailable component text for clarity on certificate publication.
- Enhanced CertificateForm to include file preview and clear functionality for uploaded images.
- Removed obsolete CertificatePage component to streamline mentor interface.
- Updated CertificateResult to handle project details and loading states more effectively.
- Improved HomeMentorPage structure by adjusting imports for better organization.
- Enhanced EligibleInternTable with navigation to results and improved error handling for certificate generation.
- Updated HomeMentorProject styles for consistency with design system.
- Added utility function to resolve image URLs for certificates.
- Introduced new hooks for generating certificates and managing notifications.
- Expanded project service functions to include project completion and assignable interns retrieval.
- Updated types for certificates and projects to reflect new data structures.
- Added user types for better type safety in user management.

src/services/ProjectService.ts

@@ -9,7 +9,8 @@ import type {
   UpdateProjectPayload,
   AssignMemberPayload,
   MemberAssignment,
-  ProjectMember
+  ProjectMember,
+  AssignableIntern
 } from "../types/project.types";
 
 // POST /project-api/add
@@ -84,6 +85,14 @@ export const archiveProject = async (
   return res.data.data;
 };
 
+
+export const completeProject = async (
+  id: string | number
+): Promise<ProjectDetail> => {
+  const res = await api.post(`/project-api/complete/${id}`);
+  return res.data.data;
+}; 
+
 // GET /project-api/my-projects (intern only)
 export const getMyProjects = async (): Promise<ProjectDetail[]> => {
   const res = await api.get("/project-api/my-projects");
@@ -108,6 +117,12 @@ export const getAllInterns = async (): Promise<InternDetail[]> => {
   return res.data.data;
 };
 
+// GET /project-api/assignable-interns
+export const getAssignableInterns = async (): Promise<AssignableIntern[]> => {
+  const res = await api.get("/project-api/assignable-interns");
+  return res.data.data;
+}
+
 // POST /project-api/assign-member (admin/mentor only)
 export const assignMember = async (
   payload: AssignMemberPayload