Add dynamic robots.txt generation and update sitemap handling

- Remove static robots.txt file.
- Implement dynamic robots.txt generator script (`generate_robots_txt.js`) to allow hostname flexibility.
- Update sitemap generation script to also use dynamic hostname from arguments.
- Modify Vite config to include automated generation of both sitemap and robots.txt during build.
- Add `public/robots.txt` to `.gitignore`.

scripts/generate_sitemap.js

@@ -1,19 +1,30 @@
 #!/usr/bin/env bun
 
 import fs from "fs";
+import {parseArgs} from "util";
+
+
+const {positionals} = parseArgs({
+  args: Bun.argv,
+  options: {},
+  strict: true,
+  allowPositionals: true,
+});
 
 const currentDate = new Date().toISOString().split("T")[0];
 
+const host = positionals[2];
+
 const sitemapTemplate = `<?xml version="1.0" encoding="UTF-8"?>
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 ">
     <url>
-        <loc>https://geoff.seemueller.io/</loc>
+        <loc>https://${host}/</loc>
         <lastmod>${currentDate}</lastmod>
         <priority>1.0</priority>
     </url>
     <url>
-        <loc>https://geoff.seemueller.io/connect</loc>
+        <loc>https://open-gsio.seemueller.workers.dev/connect</loc>
         <lastmod>${currentDate}</lastmod>
         <priority>0.7</priority>
     </url>