GPT-5.6 day-1 verification update + site announcement banner - #30

Changed pages include:

• index.html - view
• 404.html - view
• compare.html - view
• contribute.html - view
• methodology.html - view
• agents/activepieces.html - view
• agents/adala.html - view
• agents/agentgpt.html - view
• agents/amazon-bedrock-agents.html - view
• agents/amazon-kiro.html - view

There are more changes not included in the list