docs: restructure website, optimize HTML, gitignore private files

Website docs (website/docs/):
- Delete 6 stale -md.html duplicates
- Rename docs-clients/miners/developers → clients/miners/developers.html
- Unify header/nav across all 15 pages (new .site-header pattern)
- Fix 34 dead href=# links with real targets
- Upgrade Font Awesome v4→v6 in index.html
- Replace search stub with live client-side search (15-page index)
- Extract all inline CSS into shared docs.css (+630 lines)
- Extract inline theme JS into shared theme.js
- Strip inline style= attributes from 10+ pages
- Add .announce-banner, .source-links, .search-results CSS classes
- Add Markdown Source links to clients/miners/developers pages
- Update components.html title to Architecture & Components
- Move browser-wallet.html to website/wallet/, leave redirect
- Update all dates to February 2026

Website root:
- Delete 6 root-level duplicate HTML files (160KB saved)
- Rewire index.html and 404.html links

Root README.md:
- Fix 8 broken doc links to new numbered folder structure
- Update copyright to 2026

.gitignore + .example files:
- Gitignore private files: .aitbc.yaml, .env, deploy scripts,
  GPU scripts, service scripts, infra configs, .windsurf/, website README
- Create 7 .example files for GitHub users with sanitized templates
- Untrack 47 previously committed private files

Live server:
- Push all website files to aitbc-cascade:/var/www/html/
- Clean stale admin.html and index.nginx-debian.html

scripts/service/fix-services.sh

@@ -1,58 +0,0 @@
-#!/bin/bash
-
-# Quick fix to start AITBC services in container
-
-echo "🔧 Starting AITBC Services in Container"
-echo "====================================="
-
-# First, let's manually start the services
-echo "1. Starting Coordinator API..."
-cd /home/oib/windsurf/aitbc/apps/coordinator-api
-source ../../.venv/bin/activate 2>/dev/null || source .venv/bin/activate
-python -m uvicorn src.app.main:app --host 0.0.0.0 --port 8000 &
-COORD_PID=$!
-
-echo "2. Starting Blockchain Node..."
-cd ../blockchain-node
-python -m uvicorn aitbc_chain.app:app --host 0.0.0.0 --port 9080 &
-NODE_PID=$!
-
-echo "3. Starting Marketplace UI..."
-cd ../marketplace-ui
-python server.py --port 3001 &
-MARKET_PID=$!
-
-echo "4. Starting Trade Exchange..."
-cd ../trade-exchange
-python server.py --port 3002 &
-EXCHANGE_PID=$!
-
-echo ""
-echo "✅ Services started!"
-echo "Coordinator API: http://127.0.0.1:8000"
-echo "Blockchain: http://127.0.0.1:9080"
-echo "Marketplace: http://127.0.0.1:3001"
-echo "Exchange: http://127.0.0.1:3002"
-echo ""
-echo "PIDs:"
-echo "Coordinator: $COORD_PID"
-echo "Blockchain: $NODE_PID"
-echo "Marketplace: $MARKET_PID"
-echo "Exchange: $EXCHANGE_PID"
-echo ""
-echo "To stop: kill $COORD_PID $NODE_PID $MARKET_PID $EXCHANGE_PID"
-
-# Wait a bit for services to start
-sleep 3
-
-# Test endpoints
-echo ""
-echo "🧪 Testing endpoints:"
-echo "API Health:"
-curl -s http://127.0.0.1:8000/v1/health | head -c 100
-
-echo -e "\n\nAdmin Stats:"
-curl -s http://127.0.0.1:8000/v1/admin/stats -H "X-Api-Key: ${ADMIN_API_KEY}" | head -c 100
-
-echo -e "\n\nMarketplace Offers:"
-curl -s http://127.0.0.1:8000/v1/marketplace/offers | head -c 100