Implement HTML domain checker in Rust and add PowerShell script for chunked execution

- Added a Rust program that reads a list of domains from "domains.txt", checks if they return HTML content, and writes valid domains to "domains-filtered.txt".
- Introduced a PowerShell script to execute a Python script in chunks, allowing for processing of specified line ranges from the domain list.

is-html-fast/src/main.rs

@@ -0,0 +1,59 @@
+use std::fs::{File, OpenOptions};
+use std::io::{BufRead, BufReader, Write};
+use std::sync::{Arc, Mutex};
+use std::time::Duration;
+
+use rayon::prelude::*;
+use reqwest::blocking::Client;
+use reqwest::header::CONTENT_TYPE;
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let input_file = File::open("domains.txt")?;
+    let reader = BufReader::new(input_file);
+    let domains: Vec<String> = reader.lines().filter_map(Result::ok).collect();
+
+    let output_file = OpenOptions::new()
+        .create(true)
+        .write(true)
+        .truncate(true)
+        .open("domains-filtered.txt")?;
+
+    let output = Arc::new(Mutex::new(output_file));
+
+    let client = Arc::new(
+        Client::builder()
+            .timeout(Duration::from_secs(5))
+            .build()?,
+    );
+
+    domains.par_iter().for_each(|domain| {
+        let url = format!("https://{}", domain);
+        println!("Checking {}", url);
+
+        let response = client.get(&url).send();
+
+        match response {
+            Ok(resp) => {
+                if let Some(content_type) = resp.headers().get(CONTENT_TYPE) {
+                    if let Ok(content_type_str) = content_type.to_str() {
+                        if content_type_str.starts_with("text/html") {
+                            if let Ok(mut file) = output.lock() {
+                                writeln!(file, "{}", domain).ok();
+                            }
+                            println!("✅ HTML: {}", domain);
+                        } else {
+                            println!("❌ Not HTML: {} ({})", domain, content_type_str);
+                        }
+                    }
+                } else {
+                    println!("❌ No Content-Type: {}", domain);
+                }
+            }
+            Err(_) => {
+                println!("⚠️ Failed to connect: {}", domain);
+            }
+        }
+    });
+
+    Ok(())
+}