docs: replace README with Next.js boilerplate template

Updated README.md from a detailed OllaHub project description to the standard Next.js getting started template, likely to initialize or reset the project as a Next.js application.

hooks/useMarkdown.ts

@@ -0,0 +1,27 @@
+export function extractCodeBlocks(
+  text: string
+): Array<{ language: string; code: string }> {
+  const regex = /```(\w+)?\n([\s\S]*?)```/g;
+  const blocks: Array<{ language: string; code: string }> = [];
+  let match: RegExpExecArray | null;
+  while ((match = regex.exec(text)) !== null) {
+    const language = match[1] || "text";
+    const code = match[2]?.trimEnd() || "";
+    blocks.push({ language, code });
+  }
+  return blocks;
+}
+
+export function stripMarkdown(md: string): string {
+  // Remove code blocks first
+  let plain = md.replace(/```[\s\S]*?```/g, (block) =>
+    block.replace(/```[\s\S]*?\n/, "").replace(/```$/, "")
+  );
+  // Remove inline code
+  plain = plain.replace(/`([^`]+)`/g, "$1");
+  // Remove common markdown syntax
+  plain = plain
+    .replace(/(^|\s)[#>*_~`-]+/g, " ")
+    .replace(/\[(.*?)\]\((.*?)\)/g, "$1");
+  return plain;
+}