fix: add release-please config

Author: DrPsychick

.github/workflows/release-please.yml

@@ -3,8 +3,8 @@ name: release-please
 
 on:
   push:
-#    branches:
-#      - master
+    branches:
+      - main
 
 permissions:
   contents: write

.release-please-manifest.json

@@ -0,0 +1,3 @@
+{
+  "mailu-operator": "v0.1.2"
+}

release-please-config.json

@@ -0,0 +1,15 @@
+{
+  "packages": {
+    "mailu-operator": {
+      "package-name": "mailu-operator",
+      "changelog-path": "CHANGELOG.md",
+      "release-type": "go",
+      "bump-minor-pre-major": false,
+      "bump-patch-for-minor-pre-major": false,
+      "include-v-in-tag": true
+    }
+  },
+  "release-search-depth": 100,
+  "commit-search-depth": 100,
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json"
+}