Add new templates and tests for improved functionality

- Created index.html template for the homepage with service cards and partner logos.
- Added page_from_md.html template for rendering pages from markdown.
- Developed services.html template detailing various services offered.
- Implemented tests for link handling in markdown, ensuring external links open in new tabs and internal links function correctly.
- Enhanced markdown parser tests to validate heading extraction, content rendering, and link safety.
- Introduced utility tests for template rendering, HTML minification, and JavaScript minification.

Co-authored-by: Copilot <copilot@github.com>

html/imprint.html

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+<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8" /><meta http-equiv="X-UA-Compatible" content="IE=EDGE" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="description" content="Legal imprint and contact information for AllYouCanGET - Sinn Consulting. Find our company details, address, and legal disclosures as required by law." /><meta name="keywords" content="Imprint, Legal Notice, AllYouCanGET, Sinn Consulting, Impressum, contact information, legal disclosure, company details" /><meta name="robots" content="index, follow" /><link rel="canonical" href="https://allucanget.biz/imprint.html" /><meta name="theme-color" content="#111827" /><meta property="og:type" content="website" /><meta property="og:url" content="https://allucanget.biz/imprint.html" /><meta property="og:title" content="Imprint | AllYouCanGET" /><meta property="og:description" content="Official imprint and legal information for AllYouCanGET - Sinn Consulting. Includes company details and contact information." /><meta property="og:image" content="https://allucanget.biz/img/cropped-Logo-AllYouCanGet-512x512-1-180x180.png" /><meta property="og:site_name" content="AllYouCanGET" /><meta name="twitter:card" content="summary_large_image" /><meta name="twitter:url" content="https://allucanget.biz/imprint.html" /><meta name="twitter:title" content="Imprint | AllYouCanGET" /><meta name="twitter:description" content="Legal imprint and contact information for AllYouCanGET - Sinn Consulting. Find our company details, address, and legal disclosures as required by law." /><meta name="twitter:image" content="https://allucanget.biz/img/cropped-Logo-AllYouCanGet-512x512-1-180x180.png" /><link rel="stylesheet" href="css/styles.css" /><link rel="icon" href="img/cropped-Logo-AllYouCanGet-512x512-1-180x180.png" type="image/x-icon" /><title>AllYouCanGET Imprint</title></head><body><div id="header"><nav id="site-navigation"><div id="site-navigation-container"><div id="site-navigation-content"><div id="site-navigation-bar"><div id="site-navigation-brand"><a href="index.html" class="site-home-link"><img src="img/Logo-AllYouCanGet-204x100.png" alt="AllYouCanGET" class="nav-logo" /><span class="nav-text">AllYouCanGET</span></a></div><button class="hamburger-menu" aria-label="Toggle navigation"><span class="hamburger-line"></span><span class="hamburger-line"></span><span class="hamburger-line"></span></button><div class="nav-menu"><div id="site-nav-links"><a href="index.html" class="site-nav-link">Home</a><a href="services.html" class="site-nav-link">Services</a><a href="webservices.html" class="site-nav-link">Web Services</a><a href="coaching.html" class="site-nav-link">Coaching</a><a href="imprint.html" class="site-nav-link active" >Imprint</a ><a href="terms_and_conditions.html" class="site-nav-link">Terms</a></div></div></div></div></div></nav><div id="page-title"><h2 class="page-title-header">AllYouCanGET Imprint</h2><h3 class="page-subtitle">IT & Management Consulting</h3></div><div class="header-cta"><div class="header-cta-buttons"><button class="bigbutton"><a href="#contact-form"><span>Contact Us</span><span>→</span></a></button></div></div></div><div id="main-content"><div id="main"><div id="hero"><div class="container"><h1>Terms of Use – AllYouCanGET</h1></div></div><div class="section"><div class="section-container container"><h2><img src="img/it-consulting.svg" alt="IT Consulting"/> Impressum</h2><div class="section-content"><p>gemäß §5 Telemediengesetz bzw. § 5 Abs. 1 E-Commerce-Gesetz bzw. Art. 3 des Bundesgesetzes gegen den unlauteren Wettbewerb (UWG): All You Can GET, c/o Sinn Consulting, Im Dornäcker 16, CH-8967 Widen - georg AT allucanget DOT biz</p></div></div></div><div class="section"><div class="section-container container"><h2>Welcome</h2><div class="section-content"><p>Welcome to the website of <strong>AllYouCanGET – Sinn Consulting</strong>, based in Widen, Switzerland.<br/> By accessing or using this website, you agree to be bound by the following Terms of Use.<br/> If you do not agree, please refrain from using this site.</p></div></div></div><div class="section"><div class="section-container container"><h2>1. Scope of Application</h2><div class="section-content"><p>These Terms of Use govern the access to and use of the website operated by <strong>AllYouCanGET – Sinn Consulting</strong> (hereinafter “AllYouCanGET” or “the Company”).<br/> They apply to all visitors, users, and other persons who access the website. Separate agreements apply to consulting and service contracts concluded with clients. For such services, the <strong>General Terms and Conditions (GTC)</strong> of AllYouCanGET apply.</p></div></div></div><div class="section"><div class="section-container container"><h2>2. Purpose of the Website</h2><div class="section-content"><p>This website serves to provide information about the Company’s services, philosophy, and current offerings in the areas of <strong>business Line truncated