Plugins: add a bundle plugins folder (#20850)

plugins-bundled/internal/input-datasource/tsconfig.json

@@ -0,0 +1,9 @@
+{
+  "extends": "../../../packages/grafana-toolkit/src/config/tsconfig.plugin.json",
+  "include": ["src", "types"],
+  "compilerOptions": {
+    "rootDir": "./src",
+    "baseUrl": "./src",
+    "typeRoots": ["./node_modules/@types"]
+  }
+}