Refactor: Reconfigured Directory Structure & Installed 11ty

This commit refactors the project's directory structure to better align with a static site generator (SSG) workflow. The source files have been moved into a dedicated src directory, and Eleventy has been installed as the new SSG.

.eleventy.js

@@ -0,0 +1,14 @@
+module.exports = function (eleventyConfig) {
+  // ✅ Pass through static assets to the root of output
+    eleventyConfig.addPassthroughCopy({ "src/images": "images" });
+    eleventyConfig.addPassthroughCopy({ "src/styles": "styles" });
+    eleventyConfig.addPassthroughCopy({ "src/scripts": "scripts" });
+
+    return {
+        dir: {
+        input: "src",
+        output: "_site",
+        includes: "_includes",
+        },
+    };
+};