feat: add --skip-trailing-cr to helmfile diff (#625)

pkg/app/diff_test.go

@@ -36,6 +36,7 @@ type diffConfig struct {
 	diffOutput             string
 	concurrency            int
 	detailedExitcode       bool
+	stripTrailingCR        bool
 	interactive            bool
 	skipDiffOnInstall      bool
 	reuseValues            bool
@@ -126,6 +127,10 @@ func (a diffConfig) DetailedExitcode() bool {
 	return a.detailedExitcode
 }
 
+func (a diffConfig) StripTrailingCR() bool {
+	return a.stripTrailingCR
+}
+
 func (a diffConfig) Interactive() bool {
 	return a.interactive
 }