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_config2.py

@@ -0,0 +1,19 @@
+with open("/home/oib/windsurf/aitbc/apps/blockchain-node/src/aitbc_chain/config.py", "r") as f:
+    content = f.read()
+
+content = content.replace(
+    "class ChainSettings(BaseSettings):",
+    """from pydantic import BaseModel
+
+class ProposerConfig(BaseModel):
+    chain_id: str
+    proposer_id: str
+    interval_seconds: int
+    max_block_size_bytes: int
+    max_txs_per_block: int
+
+class ChainSettings(BaseSettings):"""
+)
+
+with open("/home/oib/windsurf/aitbc/apps/blockchain-node/src/aitbc_chain/config.py", "w") as f:
+    f.write(content)