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_blockchain_node_dynamic.py

@@ -0,0 +1,31 @@
+import re
+
+with open("/home/oib/windsurf/aitbc/cli/aitbc_cli/commands/blockchain.py", "r") as f:
+    content = f.read()
+
+# Instead of blindly hardcoding 10.1.223.93, we can actually fetch the first node from multichain config or use an option --node.
+# Let's add a helper inside the file.
+helper_code = """
+def _get_node_endpoint(ctx):
+    try:
+        from ..core.config import load_multichain_config
+        config = load_multichain_config()
+        if not config.nodes:
+            return "http://127.0.0.1:8082"
+        # Return the first node's endpoint
+        return list(config.nodes.values())[0].endpoint
+    except:
+        return "http://127.0.0.1:8082"
+"""
+
+# Replace the hardcoded urls with _get_node_endpoint(ctx)
+content = content.replace('f"http://10.1.223.93:8082/rpc/blocks/0?chain_id={chain_id}"', 'f"{_get_node_endpoint(ctx)}/rpc/blocks/0?chain_id={chain_id}"')
+content = content.replace('f"http://10.1.223.93:8082/rpc/mempool?chain_id={chain_id}"', 'f"{_get_node_endpoint(ctx)}/rpc/mempool?chain_id={chain_id}"')
+content = content.replace('f"http://10.1.223.93:8082/rpc/head?chain_id={chain_id}"', 'f"{_get_node_endpoint(ctx)}/rpc/head?chain_id={chain_id}"')
+content = content.replace('f"http://10.1.223.93:8082/rpc/sendTx"', 'f"{_get_node_endpoint(ctx)}/rpc/sendTx"')
+
+# Prepend the helper
+content = content.replace('import httpx', 'import httpx\n' + helper_code, 1)
+
+with open("/home/oib/windsurf/aitbc/cli/aitbc_cli/commands/blockchain.py", "w") as f:
+    f.write(content)