feat(docs): version-based docs, correct Gitea tag links, form guide help

- each release now carries a full docs snapshot (reference + handbook)
  under docs/releases/<v>/; the docs frontend loads a version's snapshot
  for /docs/vX.Y.Z/* and shows the handbook/reference of that version
- version dropdown navigates to /docs/<version> (docs home) instead of
  the release notes page; old /docs/vX.Y.Z redirect removed
- generator: --snapshot writes handbook + reference; build copies
  versioned snapshots (last 7 versions) into /docs/versions/<v>/
- fix Gitea tag links: /admin/tool-evaluator/tags/<v> was 404, correct
  URL is /releases/tag/<v>
- add GuideHelp button to forms/pages linking to the matching handbook
  guide (rating, tool add/edit, costs, compare, watchlist, analytics)

artifacts/toolrate/src/pages/tool-edit.tsx

@@ -31,6 +31,7 @@ import { FeatureInput } from "@/components/feature-input";
 import { TagInput } from "@/components/tag-input";
 import { useAuth } from "@/hooks/use-auth";
 import { FieldHelp } from "@/components/field-help";
+import { GuideHelp } from "@/components/guide-help";
 
 const toolSchema = z.object({
   name: z.string().min(2, "Name must be at least 2 characters"),
@@ -160,6 +161,7 @@ export default function ToolEdit() {
               <CardTitle className="flex items-center gap-2">
                 <Pencil className="w-5 h-5 text-primary" />
                 Tool Details
+                <GuideHelp guide="tool-bearbeiten" label="Tool Details" />
               </CardTitle>
               <CardDescription>Modify the tool information below.</CardDescription>
             </CardHeader>