feat: add Helm chart version bumping support (Chart.yaml) (#112)

Author: ricogu

.github/actions/core/action.yml

@@ -22,6 +22,10 @@ inputs:
     description: "pyproject toml file, only relevant for buildType python"
     default: "pyproject.toml"
     required: false
+  chart-file:
+    description: "Where to find the Chart.yaml file, only relevant for buildType helm"
+    default: "Chart.yaml"
+    required: false
   bump-command:
     description: "Command to update the version"
     default: ""
@@ -53,6 +57,10 @@ inputs:
     description: "If true, skip git checkout, pull, and push"
     default: "false"
     required: false
+  default-branch:
+    description: "Override the default branch for version fetching (only effective when dry-run is true). If empty or dry-run is false, uses the PR base branch from the event payload."
+    default: ""
+    required: false
 outputs:
   bumped:
     description: "True if version was bumped"