Fix slide overflow on 12 slides in Study Jam #2 deck

Add Study Jam #2: Voice AI with Gemini 3.1 Flash Live

docs: add AGENTS.md for AI agent context

feat: add live agent link and switch to adk web for dev UI

fix: switch to gemini-2.5-flash for full ADK compatibility

fix: use '.' as agents_dir in Dockerfile CMD

chore: add .dockerignore for cleaner Cloud Run builds

fix: bind adk api_server to 0.0.0.0 for Cloud Run

build: rebuild slides HTML with gemini-3-flash-preview + demo indicators

fix: use gemini-3-flash-preview, add demo indicators to slides

Redesign slides and README for 1-hour session

Build with AI: Study Jam #1 — GDG Kigali