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/getting-started.en.md

@@ -0,0 +1,53 @@
+
+# Getting Started
+
+This page guides you through the most important workflows in toolr — from your
+first visit to creating and rating a tool.
+
+## 1. Sign in
+
+Most actions (create a tool, rate, watchlist, compare) require
+an account. Click **Sign in** in the bottom left corner. Depending on the
+instance configuration you have two options:
+
+- **Local accounts:** username + password. Access is created by an admin
+  (see [Administration](/docs/handbook/administration)).
+- **OIDC (SSO):** sign in with the configured identity provider (e.g.
+  Keycloak).
+
+Which mode is active is shown by the
+[`GET /auth/mode`](/docs/reference/endpoints/auth#getAuthMode) endpoint. Details
+can be found in the [Sign in & account](/docs/handbook/konto) section.
+
+## 2. Find tools
+
+Open the **Browse tools** section:
+
+- **Search** — full-text search across name & description (shortcut `/`).
+- **Filter** — by category, tags, features and minimum rating
+  (`minRating`).
+- **Sort** — by newest, top-rated, most rated, name
+  (ascending/descending) or last update.
+
+All options in detail: [Find & browse tools](/docs/handbook/tools-finden).
+
+## 3. Create a tool
+
+Go to **Add tool** and fill in the form. Details for each field can be found
+in the [Create a tool](/docs/handbook/tool-anlegen) section and in the
+[field reference](/docs/reference/schemas/toolinput).
+
+## 4. Rate
+
+On the detail page of a tool you can submit **usefulness** and **usability**
+(1–5 each) and optionally leave a comment. Your
+rating is immediately reflected in the statistics.
+See [Rating](/docs/handbook/bewerten).
+
+## 5. Further reading
+
+- [Compare tools](/docs/handbook/vergleichen)
+- [Watchlist](/docs/handbook/watchlist)
+- [Analytics](/docs/handbook/analytics)
+- [Plans & permissions](/docs/handbook/plaene)
+- [Administration](/docs/handbook/administration)