feat: add comprehensive CI/CD pipeline

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

scripts/ci/validate-commands.js

@@ -0,0 +1,38 @@
+#!/usr/bin/env node
+/**
+ * Validate command markdown files are non-empty and readable
+ */
+
+const fs = require('fs');
+const path = require('path');
+
+const COMMANDS_DIR = path.join(__dirname, '../../commands');
+
+function validateCommands() {
+  if (!fs.existsSync(COMMANDS_DIR)) {
+    console.log('No commands directory found, skipping validation');
+    process.exit(0);
+  }
+
+  const files = fs.readdirSync(COMMANDS_DIR).filter(f => f.endsWith('.md'));
+  let hasErrors = false;
+
+  for (const file of files) {
+    const filePath = path.join(COMMANDS_DIR, file);
+    const content = fs.readFileSync(filePath, 'utf-8');
+
+    // Validate the file is non-empty readable markdown
+    if (content.trim().length === 0) {
+      console.error(`ERROR: ${file} - Empty command file`);
+      hasErrors = true;
+    }
+  }
+
+  if (hasErrors) {
+    process.exit(1);
+  }
+
+  console.log(`Validated ${files.length} command files`);
+}
+
+validateCommands();