feat: Add image uploader and metadata viewer components

- Implemented ImageUploader.svelte for drag-and-drop image uploads with metadata extraction.
- Created MetadataViewer.svelte to display extracted metadata in a user-friendly format.
- Added PrivacyInfo.svelte to inform users about client-side processing and privacy risks.
- Introduced ThemeToggle.svelte for dark mode functionality.
- Set up main.js for application entry point and configured Svelte with vite.
- Added Tailwind CSS for styling and configured Vite for asset management.
- Established svelte.config.js and tailwind.config.js for project settings.

src/lib/Footer.svelte

@@ -0,0 +1,47 @@
+<footer class="mt-12 py-8 border-t border-color text-center">
+  <div class="container">
+    <div class="grid grid-2 gap-8 mb-6">
+      <div>
+        <h3 class="font-semibold mb-3">About Untrace</h3>
+        <p class="text-sm text-secondary">
+          A privacy-first tool that removes EXIF metadata from images completely
+          in your browser. No servers, no tracking, no data collection.
+        </p>
+      </div>
+
+      <div>
+        <h3 class="font-semibold mb-3">Open Source</h3>
+        <p class="text-sm text-secondary mb-2">
+          Built with Svelte and deployed on GitHub Pages.
+        </p>
+        <a
+          href="https://github.com/yourusername/untrace"
+          class="btn btn-secondary text-sm"
+          target="_blank"
+          rel="noopener noreferrer"
+        >
+          <svg width="16" height="16" fill="currentColor" viewBox="0 0 24 24">
+            <path
+              d="M12 0c-6.626 0-12 5.373-12 12 0 5.302 3.438 9.8 8.207 11.387.599.111.793-.261.793-.577v-2.234c-3.338.726-4.033-1.416-4.033-1.416-.546-1.387-1.333-1.756-1.333-1.756-1.089-.745.083-.729.083-.729 1.205.084 1.839 1.237 1.839 1.237 1.07 1.834 2.807 1.304 3.492.997.107-.775.418-1.305.762-1.604-2.665-.305-5.467-1.334-5.467-5.931 0-1.311.469-2.381 1.236-3.221-.124-.303-.535-1.524.117-3.176 0 0 1.008-.322 3.301 1.23.957-.266 1.983-.399 3.003-.404 1.02.005 2.047.138 3.006.404 2.291-1.552 3.297-1.23 3.297-1.23.653 1.653.242 2.874.118 3.176.77.84 1.235 1.911 1.235 3.221 0 4.609-2.807 5.624-5.479 5.921.43.372.823 1.102.823 2.222v3.293c0 .319.192.694.801.576 4.765-1.589 8.199-6.086 8.199-11.386 0-6.627-5.373-12-12-12z"
+            />
+          </svg>
+          View Source
+        </a>
+      </div>
+    </div>
+
+    <div class="text-sm text-muted">
+      <p>
+        © 2025 Untrace. Built for privacy advocates, journalists, and digital
+        rights.
+      </p>
+      <p class="mt-1">No analytics • No tracking • No data collection</p>
+    </div>
+  </div>
+</footer>
+
+<style>
+  .border-t {
+    border-top: 1px solid var(--border-color);
+  }
+</style>