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_config_supported.py

@@ -0,0 +1,12 @@
+with open("/home/oib/windsurf/aitbc/apps/blockchain-node/src/aitbc_chain/config.py", "r") as f:
+    content = f.read()
+
+content = content.replace(
+    """    chain_id: str = "ait-devnet\"""",
+    """    chain_id: str = "ait-devnet"
+    supported_chains: str = "ait-devnet" # Comma-separated list of supported chain IDs"""
+)
+
+# And define ProposerConfig in consensus/poa.py instead to avoid circular import or import issues
+# Actually, the original code had it in consensus/poa.py, wait...
+# In previous version `ProposerConfig` was defined in `consensus/poa.py` and we were trying to import it from `config.py`.