fix(channels): fix TypeScript build errors

- Use bracket notation for index signature properties
- Add tsconfig.json for channels/base and channels/telegram packages

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

packages/channels/base/tsconfig.json

@@ -0,0 +1,9 @@
+{
+  "extends": "../../../tsconfig.json",
+  "compilerOptions": {
+    "outDir": "dist",
+    "rootDir": "src"
+  },
+  "include": ["src/**/*.ts"],
+  "exclude": ["node_modules", "dist"]
+}