docs: add official Anthropic docs tracker commands (MCP v1.1.0)

- Add 5 new /ccguide commands to ultimate-guide.md slash commands section
  (init-docs, refresh-docs, diff-docs, search-docs, daily)
- Add .claude/commands/ccguide/ with 5 command files for project-level access
- Document typical daily workflow: init once, then /ccguide:daily every day

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/commands/ccguide/diff-docs.md

@@ -0,0 +1,17 @@
+---
+description: Compare official Anthropic docs baseline vs current snapshot (no network — instant)
+---
+
+Use the `diff_official_docs` MCP tool.
+
+No network call — reads local index files only (~50KB each). Instant.
+
+Present the results clearly:
+- Added sections (new pages in the official docs)
+- Removed sections
+- Modified sections with line delta and first changed line
+- Unchanged count
+
+If no baseline exists, tell the user to run /ccguide:init-docs first.
+If no current snapshot exists, tell the user to run /ccguide:refresh-docs first.
+If no changes, confirm everything is in sync and suggest running /ccguide:refresh-docs to update.