docs: Sync all documentation with Claude Code February 2026 features

Update 23 files across all 10 tutorial directories and 7 reference
documents to match the latest Claude Code v2.1+ features and correct
outdated content including model names (4.5→4.6), permission modes,
hook events, CLI syntax, MCP config paths, plugin manifest format,
checkpoint commands, session management, and URLs. Add documentation
for new features: Auto Memory, Remote Control, Web Sessions, Desktop
App, Agent Teams, MCP OAuth, Task List, Sandboxing, and more.

07-plugins/pr-review/.claude-plugin/plugin.json

@@ -0,0 +1,9 @@
+{
+  "name": "pr-review",
+  "version": "1.0.0",
+  "description": "Complete PR review workflow with security, testing, and docs",
+  "author": {
+    "name": "Anthropic"
+  },
+  "license": "MIT"
+}

07-plugins/pr-review/plugin.yaml

@@ -1,28 +0,0 @@
----
-name: pr-review
-version: "1.0.0"
-description: Complete PR review workflow with security, testing, and docs
-author: Anthropic
-license: MIT
-tags:
-  - code-review
-  - quality
-  - security
-
-requires:
-  - claude-code: ">=1.0.0"
-
-components:
-  - type: commands
-    path: commands/
-  - type: agents
-    path: agents/
-  - type: mcp
-    path: mcp/
-  - type: hooks
-    path: hooks/
-
-config:
-  auto_load: true
-  enabled_by_default: true
----