ci: add release-please manifest and config

Author: KochC

.github/workflows/release-please.yml

@@ -19,4 +19,5 @@ jobs:
       - uses: googleapis/release-please-action@v4
         id: release
         with:
-          release-type: node
+          config-file: release-please-config.json
+          manifest-file: .release-please-manifest.json

.release-please-manifest.json

@@ -0,0 +1,3 @@
+{
+  ".": "1.0.0"
+}

release-please-config.json

@@ -0,0 +1,7 @@
+{
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json",
+  "release-type": "node",
+  "packages": {
+    ".": {}
+  }
+}