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/scripts/patch_cli_auth.py

@@ -0,0 +1,10 @@
+import re
+
+with open("/home/oib/windsurf/aitbc/cli/aitbc_cli/commands/client.py", "r") as f:
+    content = f.read()
+
+# Fix the auth header from "X-Api-Key" to "x-api-key" or check how it's sent
+# Fastapi headers are case insensitive, but maybe httpx is sending it wrong or it's being stripped?
+# Wait! In test_api_submit2.py we sent "X-Api-Key": "client_dev_key_1" and it worked when we used the CLI before we patched the endpoints?
+# No, test_api_submit2.py returned 401 {"detail":"invalid api key"}.
+# Why is "client_dev_key_1" invalid?