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

config/.aitbc.yaml.example

@@ -0,0 +1,3 @@
+# AITBC CLI Configuration
+# Copy to .aitbc.yaml and adjust for your environment
+coordinator_url: http://127.0.0.1:18000

config/.lycheeignore

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+# Exclude known broken external links that are not critical for documentation
+http://localhost:*
+http://aitbc.keisanki.net:*
+http://aitbc-cascade:*
+https://docs.aitbc.net/
+https://docs.aitbc.io/
+https://dashboard.aitbc.io/*
+https://aitbc.bubuit.net/admin/*
+https://aitbc.bubuit.net/api/*
+https://docs.aitbc.bubuit.net/*
+https://aitbc.io/*
+
+# Exclude external services that may be temporarily unavailable
+https://www.cert.org/
+https://pydantic-docs.helpmanual.io/
+
+# Exclude GitHub links that point to wrong organization (should be oib/AITBC)
+https://github.com/aitbc/*
+
+# Exclude GitHub discussions (may not be enabled yet)
+https://github.com/oib/AITBC/discussions
+
+# Exclude Stack Overflow tag (may not exist yet)
+https://stackoverflow.com/questions/tagged/aitbc
+
+# Exclude root-relative paths that need web server context
+/assets/*
+/docs/*
+/Exchange/*
+/explorer/*
+/firefox-wallet/*
+/ecosystem-extensions/*
+/ecosystem-analytics/*
+
+# Exclude issue tracker links that may change
+https://github.com/oib/AITBC/issues
+
+# Exclude internal documentation links that may be broken during restructuring
+**/2_clients/**
+**/3_miners/**
+**/4_blockchain/**
+**/5_marketplace/**
+**/6_architecture/**
+**/7_infrastructure/**
+**/8_development/**
+**/9_integration/**
+**/0_getting_started/**
+**/1_project/**
+**/10_plan/**
+**/11_agents/**
+**/12_issues/**
+
+# Exclude all markdown files in docs directory from link checking (too many internal links)
+docs/**/*.md

config/.nvmrc

@@ -0,0 +1 @@
+22.22.0