chore: remove configuration files and enhance blockchain explorer with advanced search, analytics, and export features

- Delete .aitbc.yaml.example CLI configuration template
- Delete .lycheeignore link checker exclusion rules
- Delete .nvmrc Node.js version specification
- Add advanced search panel with filters for address, amount range, transaction type, time range, and validator
- Add analytics dashboard with transaction volume, active addresses, and block time metrics
- Add Chart.js integration

dev/tests/test_api_submit4.py

@@ -0,0 +1,7 @@
+import requests
+
+resp = requests.post("http://127.0.0.1:8000/v1/jobs", json={
+    "payload": {"type": "inference", "model": "test-model", "prompt": "test prompt"},
+    "ttl_seconds": 900
+}, headers={"X-Api-Key": "client_dev_key_1"})
+print(resp.status_code, resp.text)