Add comprehensive poster for LLM4Hardware repository showcasing three main research areas

[Copilot]

This PR adds a professional poster for the LLM4Hardware repository that showcases the project's research contributions across three main areas: LLM4Verilog Generation, LLM4Security, and LLM4C2HLS.

What's Added

📁 New Files

• poster.html - Interactive HTML poster with modern design and responsive layout
• poster.md - Markdown version for easy viewing on GitHub
• poster-README.md - Comprehensive documentation and usage instructions

🎯 Three Main Research Areas Highlighted

🔧 LLM4Verilog Generation

• AutoChip - Functional Verilog generation with LLM feedback
• VeriThoughts - Reasoning-based Verilog code generation
• ROME - Hierarchical prompting for complex chip design
• PrefixLLM - LLM-aided prefix circuit design
• Veritas - Deterministic Verilog synthesis

🛡️ LLM4Security

• Security Assertions by Large Language Models
• Hybrid-NL2SVA - Natural Language to SystemVerilog Assertion
• OpenTitan RAG SVA Generator
• LLMPirate - Hardware IP piracy detection
• LLM-Aided Testbench Generation for FSM

⚡ LLM4C2HLS

• C2HLSC - Bridge software-to-hardware design gap
• HLS Optimization tools
• Masala-CHAI - Large-scale SPICE netlist dataset

🌟 Key Features

• Featured Submodules Section: Prominently highlights AutoChip, Security Assertions, and C2HLSC as requested
• Professional Design: Modern gradient backgrounds, color-coded sections, and clean typography
• Interactive Elements: Hover effects and responsive grid layouts
• Comprehensive Links: Direct access to papers, code repositories, and presentation slides
• Statistics Dashboard: Repository metrics showing 12+ projects, 7 submodules, and 10+ papers
• Mobile Responsive: Fully functional on desktop, tablet, and mobile devices

📱 Visual Preview

Desktop View:

Mobile View:

Usage

The poster can be used for:

• Academic conference presentations
• Research group websites
• Project documentation
• Grant proposals and funding applications

Simply open poster.html in any modern web browser, or use the browser's print function to generate a PDF version for print media.

Technical Details

• Self-contained: No external dependencies, pure HTML/CSS
• Print-friendly: Optimized for both screen viewing and printing
• Accessible: Proper semantic HTML structure with responsive design
• Fast loading: Lightweight design with efficient CSS

This poster provides a comprehensive overview of the LLM4Hardware ecosystem and serves as an excellent introduction to the project's research contributions in the intersection of Large Language Models and Hardware Design.

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[FCHXWH823]

Please change the name as LLM4Chip