docs: sync to Claude Code v2.1.119 (docs host migration, /usage, hooks mcp_tool, native binary) (#94)

- Migrate all docs.anthropic.com/en/docs/claude-code URLs to code.claude.com/docs/en
- Document /usage as canonical (v2.1.118); annotate /cost and /stats as shortcut aliases
- Update Opus 4.7: 1M context (v2.1.117 fix), xhigh default effort
- Note native-binary packaging (v2.1.113) and downloads.claude.ai host (v2.1.116)
- Hook events count normalized to 28 across all refs; add UserPromptExpansion, PostToolBatch
- Add mcp_tool as a fifth hook type (v2.1.118); duration_ms on PostToolUse (v2.1.119)
- Agent frontmatter mcpServers/permissionMode/--print tools honoring
- Glob/Grep -> bfs/ugrep footnote for native macOS/Linux builds
- Plugin marketplace enforcement (v2.1.117) + hostPattern/pathPattern (v2.1.119)
- --from-pr supports GitLab MR, Bitbucket PR, GitHub Enterprise (v2.1.119)
- Document 5 new env vars: DISABLE_UPDATES, CLAUDE_CODE_HIDE_CWD, CLAUDE_CODE_FORK_SUBAGENT, ENABLE_TOOL_SEARCH, OTEL_LOG_TOOL_DETAILS
- Deprecate includeCoAuthoredBy and voiceEnabled; add prUrlTemplate setting
- Add new features: /theme, /btw, claude plugin tag, claude install [version], sandbox.network.deniedDomains, auto mode "\$defaults", wslInheritsWindowsSettings, Vim visual modes, /doctor improvements, forked subagents, disableSkillShellExecution
- Refresh footers to Last Updated April 24, 2026 / Claude Code Version 2.1.119

scripts/check_links.py

@@ -35,6 +35,9 @@ SKIP_DOMAINS = {
     "wikipedia.org",
     # GitHub API requires auth — unauthenticated requests return 404 for protected endpoints
     "api.github.com",
+    # Claude Code native-binary download host — directory listing returns 404, artifacts are
+    # fetched programmatically by the installer via the full filename path
+    "downloads.claude.ai",
 }
 SKIP_DOMAIN_SUFFIXES = (".example.com", ".example.org", ".internal")
 # Placeholder/template URLs that are intentionally non-resolvable