feat: regroup homepage into apps/tutorial/services/libraries cards

- assign each repo a section via config.yml (blog -> apps,
  media-manager -> tutorial, auth-server -> services, rest -> libraries)
- render one card per repo with a bottom-justified action row containing
  one link per available kind (view docs / view wiki / view lib /
  view tutorial)
- switch card grid to three columns with responsive breakpoints and
  taller cards

config.yml

@@ -12,7 +12,8 @@
 #   wiki -> /<repo>/       when the wiki is the whole site (e.g. mongo-ops)
 #        -> /<repo>/wiki/  in combined sites (e.g. doc-forge with lib + wiki)
 #   mcp  -> MCP server on its configured port
-# The docs homepage lists a repo once per declared kind (lib, api, wiki).
+# The docs homepage shows one card per repo, grouped by its `section`
+# (apps, tutorial, services, libraries); card links cover the repo's kinds.
 
 service:
   name: aetos-docs
@@ -24,6 +25,7 @@ repos:
     source: ../openapi-first
     title: OpenAPI First
     description: Design-first API development toolkit enforcing OpenAPI contracts as the single source of truth.
+    section: libraries
     docs:
       lib: site
       mcp: { bundle: docs/mcp, server: openapi_first, port: 8004 }
@@ -32,6 +34,7 @@ repos:
     source: ../doc-forge
     title: Doc Forge
     description: Renderer-agnostic Python documentation compiler powering MkDocs and MCP generation across Aetoskia projects.
+    section: libraries
     docs:
       wiki: site
       lib: site
@@ -41,6 +44,7 @@ repos:
     source: ../dagpipe
     title: DAG Pipe
     description: Deterministic pipeline framework for executing state transformations through a directed acyclic graph (DAG).
+    section: libraries
     docs:
       lib: site
       mcp: { bundle: docs/mcp, server: dagpipe, port: 8006 }
@@ -49,6 +53,7 @@ repos:
     source: ../mail-intake
     title: Mail Intake
     description: High-performance email ingestion and processing framework with pluggable adapters and automation workflows.
+    section: libraries
     docs:
       lib: site
       mcp: { bundle: docs/mcp, server: mail_intake, port: 8002 }
@@ -57,6 +62,7 @@ repos:
     source: ../omniread
     title: Omniread
     description: Unified ingestion and normalization layer for structured and unstructured data sources.
+    section: libraries
     docs:
       lib: site
       mcp: { bundle: docs/mcp, server: omniread, port: 8003 }
@@ -65,6 +71,7 @@ repos:
     source: ../py-jwt
     title: Py JWT
     description: Lightweight, explicit JWT utilities for Python services with strong validation and minimal magic.
+    section: libraries
     docs:
       lib: site
       mcp: { bundle: docs/mcp, server: jwtlib, port: 8005 }
@@ -73,6 +80,7 @@ repos:
     source: ../hexa
     title: Hexa
     description: Hexagonal architecture framework and toolbox for Python services.
+    section: libraries
     docs:
       lib: site
 
@@ -80,6 +88,7 @@ repos:
     source: ../mongo-ops
     title: Mongo Ops
     description: A modular, async MongoDB operations layer for FastAPI microservices. Simplifies CRUD, transactions, and model management.
+    section: libraries
     docs:
       wiki: site
 
@@ -87,6 +96,7 @@ repos:
     source: ../auth-server
     title: Auth Server
     description: Aetoskia authentication service. OpenAPI-driven, FastAPI backend for auth flows.
+    section: services
     docs:
       api: site
 
@@ -95,10 +105,12 @@ static:
     repo: blog
     title: Blog API
     description: A modular, async Blog API backend for FastAPI microservices. Provides streamlined CRUD operations for articles and authors.
+    section: apps
     path: blog
 
   - kind: tutorial
     repo: media-manager
     title: Media Manager Tutorial
     description: Step-by-step guide to the Media Manager architecture, ingestion pipeline, automation workflows, and integrations.
+    section: tutorial
     path: media-manager