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_poa_internal.py

@@ -0,0 +1,35 @@
+with open("/home/oib/windsurf/aitbc/apps/blockchain-node/src/aitbc_chain/consensus/poa.py", "r") as f:
+    content = f.read()
+
+import re
+
+# Remove httpx import and the try/except block that checks localhost:8082/metrics
+content = content.replace("import httpx\n", "")
+
+bad_code = """        # Check RPC mempool for transactions
+        try:
+            response = httpx.get("http://localhost:8082/metrics")
+            if response.status_code == 200:
+                has_transactions = False
+                for line in response.text.split("\\n"):
+                    if line.startswith("mempool_size"):
+                        size = float(line.split(" ")[1])
+                        if size > 0:
+                            has_transactions = True
+                        break
+                
+                if not has_transactions:
+                    return
+        except Exception as exc:
+            self._logger.error(f"Error checking RPC mempool: {exc}")
+            return"""
+
+good_code = """        # Check internal mempool
+        from ..mempool import get_mempool
+        if get_mempool().size(self._config.chain_id) == 0:
+            return"""
+
+content = content.replace(bad_code, good_code)
+
+with open("/home/oib/windsurf/aitbc/apps/blockchain-node/src/aitbc_chain/consensus/poa.py", "w") as f:
+    f.write(content)