feat: add comprehensive CI/CD pipeline

Adds GitHub Actions workflows for CI, maintenance, and releases with multi-platform testing matrix.

scripts/ci/validate-rules.js

@@ -0,0 +1,48 @@
+#!/usr/bin/env node
+/**
+ * Validate rule markdown files
+ */
+
+const fs = require('fs');
+const path = require('path');
+
+const RULES_DIR = path.join(__dirname, '../../rules');
+
+function validateRules() {
+  if (!fs.existsSync(RULES_DIR)) {
+    console.log('No rules directory found, skipping validation');
+    process.exit(0);
+  }
+
+  const files = fs.readdirSync(RULES_DIR, { recursive: true })
+    .filter(f => f.endsWith('.md'));
+  let hasErrors = false;
+  let validatedCount = 0;
+
+  for (const file of files) {
+    const filePath = path.join(RULES_DIR, file);
+    try {
+      const stat = fs.statSync(filePath);
+      if (!stat.isFile()) continue;
+
+      const content = fs.readFileSync(filePath, 'utf-8');
+      if (content.trim().length === 0) {
+        console.error(`ERROR: ${file} - Empty rule file`);
+        hasErrors = true;
+        continue;
+      }
+      validatedCount++;
+    } catch (err) {
+      console.error(`ERROR: ${file} - ${err.message}`);
+      hasErrors = true;
+    }
+  }
+
+  if (hasErrors) {
+    process.exit(1);
+  }
+
+  console.log(`Validated ${validatedCount} rule files`);
+}
+
+validateRules();