refactor: consolidate blockchain explorer into single app and update backup ignore patterns

- Remove standalone explorer-web app (README, HTML, package files)
- Add /web endpoint to blockchain-explorer for web interface access
- Update .gitignore to exclude application backup archives (*.tar.gz, *.zip)
- Add backup documentation files to .gitignore (BACKUP_INDEX.md, README.md)
- Consolidate explorer functionality into main blockchain-explorer application

dev/cli/cli-staging-config.yaml

@@ -0,0 +1,9 @@
+# CLI Staging Configuration
+coordinator_url: http://127.0.0.1:8001
+api_key: null
+output_format: table
+config_file: /home/oib/windsurf/aitbc/cli-dev/cli-staging-config.yaml
+test_mode: true
+timeout: 30
+debug: true
+staging: true