feat: allow overriding getMarkdownCode

allow overriding `DefaultBadgeBuilder.getMarkdownCode`

Signed-off-by: Patrick Jungermann <Patrick.Jungermann@gmail.com>

.changeset/fresh-bulldogs-own.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-badges-backend': patch
+---
+
+allow overriding `DefaultBadgeBuilder.getMarkdownCode`

plugins/badges-backend/api-report.md

@@ -122,6 +122,8 @@ export class DefaultBadgeBuilder implements BadgeBuilder {
   createBadgeSvg(options: BadgeOptions): Promise<string>;
   // (undocumented)
   getBadges(): Promise<BadgeInfo[]>;
+  // (undocumented)
+  protected getMarkdownCode(params: Badge, badgeUrl: string): string;
 }
 
 // Warning: (ae-missing-release-tag) "RouterOptions" is exported by the package, but it is missing a release tag (@alpha, @beta, @public, or @internal)

plugins/badges-backend/src/lib/BadgeBuilder/DefaultBadgeBuilder.ts

@@ -70,7 +70,7 @@ export class DefaultBadgeBuilder implements BadgeBuilder {
     }
   }
 
-  private getMarkdownCode(params: Badge, badgeUrl: string): string {
+  protected getMarkdownCode(params: Badge, badgeUrl: string): string {
     let altText = `${params.label}: ${params.message}`;
     if (params.description && params.description !== params.label) {
       altText = `${params.description}, ${altText}`;