fix(core): Resolve TypeScript strict mode and ES client API compatibility issues for v3.0.0

- Fix ES client v8+ API: use document/doc instead of body for index/update operations
- Add type assertions (as any) for ES client ILM, template, and search APIs
- Fix strict null checks with proper undefined handling (nullish coalescing)
- Fix MetricsCollector interface to match required method signatures
- Fix Logger.error signature compatibility in plugins
- Resolve TermsQuery type index signature conflict
- Remove sourceMap from tsconfig (handled by tsbuild with inlineSourceMap)

npmextra.json

@@ -13,5 +13,8 @@
       "npmPackagename": "@mojoio/elasticsearch",
       "license": "MIT"
     }
+  },
+  "tsbuild": {
+    "tsconfig": "./tsconfig.json"
   }
-}
+}