docs: cut to v0.9.0 with unified .de/.en naming

- Remove all prior release notes and version snapshots (v0.6.0-v0.8.6)
- Rename handbook to *.de.md; keep *.en.md
- New release notes v0.9.0.de.md/.en.md with v0.9.0 snapshot
- generate-docs.mjs: .de/.en convention incl. search index and en-fallback
- docs.tsx: release fallback now uses version.de.md
- Wording: neutral tagline, anonymous user, no gender forms
- Add docs/examples/import-tools.yaml and link from administration docs

docs/releases/v0.9.0/handbook/papierkorb.en.md

@@ -0,0 +1,40 @@
+
+# Trash
+
+The **trash** (`/trash`) contains soft-deleted tools. With trash access
+they can be restored; permanent deletion is reserved for admins.
+
+> The trash is a **premium feature** (`trash`, Premium/Enterprise).
+> Admins always have access.
+
+## Access
+
+The trash can be reached via the user menu or the sidebar.
+Without the `trash` permission, a hint about changing the plan appears.
+
+## Restoring
+
+- Select one or more tools (checkboxes).
+- Click on **Restore (N)** — the tools appear again in all
+  public views.
+
+> Restoring is available to anyone with trash access.
+
+## Permanently delete (admin only)
+
+- **Delete (N)** **permanently** removes the selected tools — including
+  all ratings, costs and links. This cannot be undone.
+- **Empty trash** permanently removes all soft-deleted tools.
+
+## Table
+
+The trash lists: name, category, **Deleted on** (`tt.MM.jjjj HH:mm`),
+**Deleted by** as well as actions (Restore; Delete admin only). The search
+filters by name.
+
+## API
+
+- [`GET /tools/trash`](/docs/reference/endpoints/tools#listTrashedTools) — list
+- [`POST /tools/trash/restore`](/docs/reference/endpoints/tools#restoreTools) — restore
+- [`DELETE /tools/trash`](/docs/reference/endpoints/tools#deleteTrashedTools) — permanently delete (admin)
+- [`POST /tools/trash/empty`](/docs/reference/endpoints/tools#emptyTrash) — empty trash (admin)