feat(website): add samples/cookbook page with recipe browser

Integrates the cookbook/ folder into the website's Samples page:

Data Structure:
- Add cookbook/cookbook.yml manifest defining cookbooks and recipes
- Add .schemas/cookbook.schema.json for validation
- Add COOKBOOK_DIR constant to eng/constants.mjs

Build Integration:
- Add generateSamplesData() to generate samples.json from cookbook.yml
- Include recipe variants with file paths for each language
- Add samples count to manifest.json

Website UI:
- Create samples.ts with FuzzySearch, language/tag filtering
- Replace placeholder samples.astro with functional recipe browser
- Recipe cards with language indicators and action buttons
- Language tabs for switching between implementations
- View Recipe/View Example buttons open modal
- GitHub link for each recipe

Features:
- Search recipes by name/description
- Filter by programming language (Node.js, Python, .NET, Go)
- Filter by tags (multi-select with Choices.js)
- 5 recipes across 4 languages = 20 recipe variants

website/public/data/agents.json

@@ -148,6 +148,24 @@
       "path": "agents/apify-integration-expert.agent.md",
       "filename": "apify-integration-expert.agent.md"
     },
+    {
+      "id": "arch-linux-expert",
+      "title": "Arch Linux Expert",
+      "description": "Arch Linux specialist focused on pacman, rolling-release maintenance, and Arch-centric system administration workflows.",
+      "model": "GPT-5",
+      "tools": [
+        "codebase",
+        "search",
+        "terminalCommand",
+        "runCommands",
+        "edit/editFiles"
+      ],
+      "hasHandoffs": false,
+      "handoffs": [],
+      "mcpServers": [],
+      "path": "agents/arch-linux-expert.agent.md",
+      "filename": "arch-linux-expert.agent.md"
+    },
     {
       "id": "arm-migration",
       "title": "Arm Migration Agent",
@@ -569,6 +587,24 @@
       "path": "agents/cast-imaging-structural-quality-advisor.agent.md",
       "filename": "cast-imaging-structural-quality-advisor.agent.md"
     },
+    {
+      "id": "centos-linux-expert",
+      "title": "CentOS Linux Expert",
+      "description": "CentOS (Stream/Legacy) Linux specialist focused on RHEL-compatible administration, yum/dnf workflows, and enterprise hardening.",
+      "model": "GPT-4.1",
+      "tools": [
+        "codebase",
+        "search",
+        "terminalCommand",
+        "runCommands",
+        "edit/editFiles"
+      ],
+      "hasHandoffs": false,
+      "handoffs": [],
+      "mcpServers": [],
+      "path": "agents/centos-linux-expert.agent.md",
+      "filename": "centos-linux-expert.agent.md"
+    },
     {
       "id": "clojure-interactive-programming",
       "title": "Clojure Interactive Programming",
@@ -730,6 +766,24 @@
       "path": "agents/custom-agent-foundry.agent.md",
       "filename": "custom-agent-foundry.agent.md"
     },
+    {
+      "id": "debian-linux-expert",
+      "title": "Debian Linux Expert",
+      "description": "Debian Linux specialist focused on stable system administration, apt-based package management, and Debian policy-aligned practices.",
+      "model": "Claude Sonnet 4",
+      "tools": [
+        "codebase",
+        "search",
+        "terminalCommand",
+        "runCommands",
+        "edit/editFiles"
+      ],
+      "hasHandoffs": false,
+      "handoffs": [],
+      "mcpServers": [],
+      "path": "agents/debian-linux-expert.agent.md",
+      "filename": "debian-linux-expert.agent.md"
+    },
     {
       "id": "debug",
       "title": "Debug",
@@ -1103,6 +1157,24 @@
       "path": "agents/expert-react-frontend-engineer.agent.md",
       "filename": "expert-react-frontend-engineer.agent.md"
     },
+    {
+      "id": "fedora-linux-expert",
+      "title": "Fedora Linux Expert",
+      "description": "Fedora (Red Hat family) Linux specialist focused on dnf, SELinux, and modern systemd-based workflows.",
+      "model": "GPT-5",
+      "tools": [
+        "codebase",
+        "search",
+        "terminalCommand",
+        "runCommands",
+        "edit/editFiles"
+      ],
+      "hasHandoffs": false,
+      "handoffs": [],
+      "mcpServers": [],
+      "path": "agents/fedora-linux-expert.agent.md",
+      "filename": "fedora-linux-expert.agent.md"
+    },
     {
       "id": "gilfoyle",
       "title": "Gilfoyle",
@@ -2232,6 +2304,28 @@
       "path": "agents/refine-issue.agent.md",
       "filename": "refine-issue.agent.md"
     },
+    {
+      "id": "repo-architect",
+      "title": "Repo Architect",
+      "description": "Bootstraps and validates agentic project structures for GitHub Copilot (VS Code) and OpenCode CLI workflows. Run after `opencode /init` or VS Code Copilot initialization to scaffold proper folder hierarchies, instructions, agents, skills, and prompts.",
+      "model": "GPT-4.1",
+      "tools": [
+        "changes",
+        "codebase",
+        "editFiles",
+        "fetch",
+        "new",
+        "problems",
+        "runCommands",
+        "search",
+        "terminalLastCommand"
+      ],
+      "hasHandoffs": false,
+      "handoffs": [],
+      "mcpServers": [],
+      "path": "agents/repo-architect.agent.md",
+      "filename": "repo-architect.agent.md"
+    },
     {
       "id": "ruby-mcp-expert",
       "title": "Ruby MCP Expert",