test(docs): enforce generated public image inventory

Author: FelixTJDietrich

.github/workflows/ci-tests.yml

@@ -120,7 +120,7 @@ jobs:
               timeout --kill-after=30s 15m bun run test:storybook
               bun run export:readme-assets
               if [[ -n "$(git status --porcelain --untracked-files=all -- ../docs/images/readme)" ]]; then
-                echo "::error::README images are stale. Run 'bun run --filter webapp export:readme-assets' and commit the result."
+                echo "::error::README or documentation images are stale. Run 'bun run --filter webapp export:readme-assets' and commit the result."
                 git status --short --untracked-files=all -- ../docs/images/readme
                 exit 1
               fi

webapp/scripts/export-readme-assets.ts

@@ -1,5 +1,5 @@
 import { spawn } from "node:child_process";
-import { mkdir } from "node:fs/promises";
+import { mkdir, rm } from "node:fs/promises";
 import { resolve } from "node:path";
 
 import { type Browser, chromium } from "playwright";
@@ -104,6 +104,7 @@ async function capture(
 	}
 }
 
+await rm(outputDirectory, { recursive: true, force: true });
 await mkdir(outputDirectory, { recursive: true });
 const storybook = spawn(
 	"bun",