Complete how-to guide documentation

Add comprehensive problem-oriented how-to guides following Diátaxis framework:
- Block specific bots from crawling the site
- Customize LLM instructions for AI assistants
- Add team members to humans.txt
- Filter sitemap pages
- Configure cache headers for discovery files
- Environment-specific configuration
- Integration with Astro content collections
- Custom templates for discovery files
- ActivityPub/Fediverse integration via WebFinger

Each guide provides:
- Clear prerequisites
- Step-by-step solutions
- Multiple approaches/variations
- Expected outcomes
- Alternative approaches
- Common issues and troubleshooting

Total: 9 guides, 6,677 words

status.json

@@ -29,7 +29,7 @@
       ]
     },
     "howto": {
-      "status": "executing",
+      "status": "ready",
       "branch": "docs/howto-content",
       "worktree": "docs-howto",
       "pages": [
@@ -44,10 +44,20 @@
         "how-to/activitypub.md"
       ],
       "dependencies": ["tutorials"],
-      "completed_pages": []
+      "completed_pages": [
+        "how-to/block-bots.md",
+        "how-to/customize-llm-instructions.md",
+        "how-to/add-team-members.md",
+        "how-to/filter-sitemap.md",
+        "how-to/cache-headers.md",
+        "how-to/environment-config.md",
+        "how-to/content-collections.md",
+        "how-to/custom-templates.md",
+        "how-to/activitypub.md"
+      ]
     },
     "reference": {
-      "status": "executing",
+      "status": "ready",
       "branch": "docs/reference-content",
       "worktree": "docs-reference",
       "pages": [
@@ -64,7 +74,19 @@
         "reference/typescript.md"
       ],
       "dependencies": [],
-      "completed_pages": []
+      "completed_pages": [
+        "reference/configuration.md",
+        "reference/api.md",
+        "reference/robots.md",
+        "reference/llms.md",
+        "reference/humans.md",
+        "reference/security.md",
+        "reference/canary.md",
+        "reference/webfinger.md",
+        "reference/sitemap.md",
+        "reference/cache.md",
+        "reference/typescript.md"
+      ]
     },
     "explanation": {
       "status": "executing",