fix: improve project data handling and sitemap generation

Refactor project data parsing to ensure type safety by casting 
the project data as a string. Enhance the sitemap generation 
by fetching data from a dynamic API route, allowing for 
more accurate and up-to-date sitemap entries. Remove unused 
project markdown files to clean up the project structure. 
These changes improve code reliability and maintainability.

app/components/Projects.tsx

@@ -14,6 +14,10 @@ interface Project {
   meta_description: string;
 }
 
+interface ProjectsData {
+  posts: Project[];
+}
+
 export default function Projects() {
   const [projects, setProjects] = useState<Project[]>([]);
   const [isVisible, setIsVisible] = useState(false);
@@ -25,7 +29,7 @@ export default function Projects() {
         if (!response.ok) {
           throw new Error("Failed to fetch projects from Ghost");
         }
-        const projectsData = await response.json();
+        const projectsData = (await response.json()) as ProjectsData;
         setProjects(projectsData.posts);
 
         setTimeout(() => {
@@ -52,7 +56,7 @@ export default function Projects() {
           <Link
             key={project.id}
             href={{
-              pathname: `/Projects/${project.slug}`,
+              pathname: `/projects/${project.slug}`,
               query: { project: JSON.stringify(project) },
             }}
             className="cursor-pointer"