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/api/sitemap/route.tsx

@@ -0,0 +1,68 @@
+import { NextResponse } from "next/server";
+
+interface Project {
+  slug: string;
+}
+
+interface ProjectsData {
+  posts: Project[];
+}
+
+interface SitemapRoute {
+  url: string;
+  lastModified: string;
+}
+
+const baseUrl = "http://localhost:3000";
+
+const generateSitemap = async (): Promise<SitemapRoute[]> => {
+  try {
+    // Static pages
+    const staticRoutes: SitemapRoute[] = [
+      { url: `${baseUrl}/`, lastModified: new Date().toISOString() },
+      {
+        url: `${baseUrl}/privacy-policy`,
+        lastModified: new Date().toISOString(),
+      },
+      {
+        url: `${baseUrl}/legal-notice`,
+        lastModified: new Date().toISOString(),
+      },
+    ];
+
+    // Fetch project data from your API
+    console.log("Fetching project data from API...");
+    const response = await fetch(`${baseUrl}/api/fetchAllProjects`);
+    if (!response.ok) {
+      throw new Error(
+        `Failed to fetch projects from Ghost: ${response.statusText}`,
+      );
+    }
+    const projectsData = (await response.json()) as ProjectsData;
+    console.log("Fetched project data:", projectsData);
+
+    // Generate dynamic routes for projects
+    const projectRoutes: SitemapRoute[] = projectsData.posts.map((project) => ({
+      url: `${baseUrl}/projects/${project.slug}`,
+      lastModified: new Date().toISOString(),
+    }));
+
+    return [...staticRoutes, ...projectRoutes];
+  } catch (error) {
+    console.error("Error generating sitemap:", error);
+    throw error;
+  }
+};
+
+export async function GET() {
+  try {
+    const sitemap = await generateSitemap();
+    return NextResponse.json(sitemap);
+  } catch (error) {
+    console.error("Failed to generate sitemap:", error);
+    return NextResponse.json(
+      { error: "Failed to generate sitemap" },
+      { status: 500 },
+    );
+  }
+}