refactor(plugin): read config via api.pluginConfig and api.config

- Mirror dirigent plugin registration pattern
- Read base config from api.pluginConfig
- Read live config from api.config.plugins.entries.harborforge-monitor.config
- Support gateway_start/gateway_stop lifecycle only
- Compile nested plugin/core files

plugin/tsconfig.json

@@ -12,6 +12,6 @@
     "declarationMap": true,
     "sourceMap": true
   },
-  "include": ["*.ts"],
+  "include": ["**/*.ts"],
   "exclude": ["node_modules"]
 }