docs: SEO and AI discoverability improvements

- Add description to docs.json for llms.txt blockquote summary
- Add title frontmatter to 10 docs files for llms.txt link text
- ci(docker): skip builds for docs-only changes

docs/reference/templates/AGENTS.md

@@ -1,4 +1,5 @@
 ---
+title: "AGENTS.md Template"
 summary: "Workspace template for AGENTS.md"
 read_when:
   - Bootstrapping a workspace manually

docs/reference/templates/BOOT.md

@@ -1,4 +1,5 @@
 ---
+title: "BOOT.md Template"
 summary: "Workspace template for BOOT.md"
 read_when:
   - Adding a BOOT.md checklist

docs/reference/templates/BOOTSTRAP.md

@@ -1,4 +1,5 @@
 ---
+title: "BOOTSTRAP.md Template"
 summary: "First-run ritual for new agents"
 read_when:
   - Bootstrapping a workspace manually

docs/reference/templates/HEARTBEAT.md

@@ -1,4 +1,5 @@
 ---
+title: "HEARTBEAT.md Template"
 summary: "Workspace template for HEARTBEAT.md"
 read_when:
   - Bootstrapping a workspace manually

docs/reference/templates/SOUL.md

@@ -1,4 +1,5 @@
 ---
+title: "SOUL.md Template"
 summary: "Workspace template for SOUL.md"
 read_when:
   - Bootstrapping a workspace manually

docs/reference/templates/TOOLS.md

@@ -1,4 +1,5 @@
 ---
+title: "TOOLS.md Template"
 summary: "Workspace template for TOOLS.md"
 read_when:
   - Bootstrapping a workspace manually