feat: добавить skill для SLM Design

- добавлена сборка self-contained skill для Claude Code и opencode

- добавлен install-ready архив skill в public/slm-design/skill

- обновлена карточка SLM Design с меню действий открыть/скачать

- добавлен static fallback главной страницы из общего конфига

- подключены Mantine Menu и Phosphor Icons для действий карточки

src/config/docs.config.ts

@@ -3,6 +3,23 @@ export type DocLink = {
   href: string
 }
 
+export type DocAction = {
+  label: string
+  href: string
+}
+
+export type DocActionGroup = {
+  title: string
+  actions: DocAction[]
+}
+
+export type DocActionCollection = DocAction[] | DocActionGroup[]
+
+export type DocActionGroups = {
+  open?: DocActionCollection
+  download?: DocActionCollection
+}
+
 export type DocCard = {
   title: string
   label: string
@@ -12,6 +29,7 @@ export type DocCard = {
   status: string
   accent: string
   links: DocLink[]
+  actionGroups?: DocActionGroups
 }
 
 export const docs: DocCard[] = [
@@ -23,10 +41,44 @@ export const docs: DocCard[] = [
     href: '/slm-design/',
     status: 'Доступно',
     accent: 'violet',
-    links: [
-      { label: 'llms.txt', href: '/slm-design/llms.txt' },
-      { label: 'llms-full.txt', href: '/slm-design/llms-full.txt' },
-    ],
+    links: [],
+    actionGroups: {
+      open: [
+        {
+          title: 'Читать',
+          actions: [
+            { label: 'SLM Документация', href: '/slm-design/' },
+          ],
+        },
+        {
+          title: 'Skill для CLI-агентов',
+          actions: [
+            { label: 'slm-design/SKILL.md', href: '/slm-design/skill/.opencode/skills/slm-design/SKILL.md' },
+          ],
+        },
+        {
+          title: 'AI агентам',
+          actions: [
+            { label: 'llms.txt', href: '/slm-design/llms.txt' },
+            { label: 'llms-full.txt', href: '/slm-design/llms-full.txt' },
+          ],
+        },
+      ],
+      download: [
+        {
+          title: 'Документация MD',
+          actions: [
+            { label: 'slm-design.zip', href: '/slm-design/slm-design.zip' },
+          ],
+        },
+        {
+          title: 'Skills (Claude code / OpenCode)',
+          actions: [
+            { label: 'slm-design.skill.zip', href: '/slm-design/skill/slm-design.skill.zip' },
+          ],
+        },
+      ],
+    },
   },
   {
     title: 'NextJS Style Guide',