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_mempool3.py

@@ -0,0 +1,16 @@
+with open("/home/oib/windsurf/aitbc/apps/blockchain-node/src/aitbc_chain/mempool.py", "r") as f:
+    content = f.read()
+
+# Fix the missing chain_id parameter in _update_gauge call
+content = content.replace(
+    """def _update_gauge(self) -> None:""",
+    """def _update_gauge(self, chain_id: str = "ait-devnet") -> None:"""
+)
+
+content = content.replace(
+    """self._update_gauge()""",
+    """self._update_gauge(chain_id)"""
+)
+
+with open("/home/oib/windsurf/aitbc/apps/blockchain-node/src/aitbc_chain/mempool.py", "w") as f:
+    f.write(content)