refactor: moved plugins to own folders

lib/cache-busting/plugin.js

@@ -0,0 +1,68 @@
+const fs = require("fs");
+const crypto = require("crypto");
+const path = require("path");
+
+const fileHashCache = {};
+const getFileHash = (file, dir = "css") => {
+  const cacheKey = `${dir}/${file}`;
+  if (fileHashCache[cacheKey]) return fileHashCache[cacheKey];
+  
+  const filePath = path.join(__dirname, '..', '..', dir, file);
+  try {
+    const content = fs.readFileSync(filePath, "utf-8");
+    const hash = crypto.createHash("md5").update(content).digest("hex").slice(0, 8);
+    fileHashCache[cacheKey] = hash;
+    return hash;
+  } catch (e) {
+    console.warn(`Could not hash file: ${file} in ${dir}`);
+    return null;
+  }
+};
+
+const copyHashedFiles = (sourceDir, outputDir) => {
+  if (!fs.existsSync(sourceDir)) return;
+  
+  if (!fs.existsSync(outputDir)) {
+    fs.mkdirSync(outputDir, { recursive: true });
+  }
+  
+  const dirName = path.basename(sourceDir);
+  const files = fs.readdirSync(sourceDir);
+  for (const file of files) {
+    const hash = getFileHash(file, dirName);
+    const ext = path.extname(file);
+    const base = path.basename(file, ext);
+    const hashedName = `${base}${hash == null ? '' : `.${hash}`}${ext}`;
+    
+    fs.copyFileSync(
+      path.join(sourceDir, file),
+      path.join(outputDir, hashedName)
+    );
+  }
+};
+
+const cacheBustingPlugin = (eleventyConfig, { rootDir }) => {
+  eleventyConfig.addFilter("fileHash", (file, dir = "css") => {
+    const hash = getFileHash(file, dir);
+    const ext = path.extname(file);
+    const base = path.basename(file, ext);
+    return `/${dir}/${base}.${hash}${ext}`;
+  });
+
+  eleventyConfig.on("eleventy.before", async () => {
+    // Copy CSS files with hashes
+    const cssDir = path.join(rootDir, "css");
+    const outputCssDir = path.join(rootDir, "_site", "css");
+    copyHashedFiles(cssDir, outputCssDir);
+
+    // Copy assets files with hashes
+    const assetsDir = path.join(rootDir, "assets");
+    const outputAssetsDir = path.join(rootDir, "_site", "assets");
+    copyHashedFiles(assetsDir, outputAssetsDir);
+  });
+};
+
+module.exports = {
+  cacheBustingPlugin,
+  getFileHash,
+};