feat: add Perl language rules and update documentation

Add rules/perl/ with 5 rule files (coding-style, testing, patterns,
  hooks, security) following the same structure as existing languages.
  Update README.md, README.zh-CN.md, and rules/README.md to document
  Perl support including badges, directory trees, install instructions,
  and rule counts.

rules/perl/hooks.md

@@ -0,0 +1,22 @@
+---
+paths:
+  - "**/*.pl"
+  - "**/*.pm"
+  - "**/*.t"
+  - "**/*.psgi"
+  - "**/*.cgi"
+---
+# Perl Hooks
+
+> This file extends [common/hooks.md](../common/hooks.md) with Perl specific content.
+
+## PostToolUse Hooks
+
+Configure in `~/.claude/settings.json`:
+
+- **perltidy**: Auto-format `.pl` and `.pm` files after edit
+- **perlcritic**: Run lint check after editing `.pm` files
+
+## Warnings
+
+- Warn about `print` in non-script `.pm` files — use `say` or a logging module (e.g., `Log::Any`)