feat: initial CLI structure

- init: create plugin boilerplate
- install: install from local path with deps
- list: show installed plugins
- validate: check manyplug.json syntax

src/commands/validate.js

@@ -0,0 +1,72 @@
+import fs from 'fs-extra';
+import path from 'path';
+import chalk from 'chalk';
+
+const REQUIRED_FIELDS = ['name', 'version', 'category'];
+const VALID_CATEGORIES = ['games', 'media', 'utility', 'service', 'admin', 'fun'];
+
+export async function validateCommand(pluginPath) {
+  const targetPath = pluginPath ? path.resolve(pluginPath) : process.cwd();
+  const manifestPath = path.join(targetPath, 'manyplug.json');
+
+  if (!await fs.pathExists(manifestPath)) {
+    console.error(chalk.red(`❌ manyplug.json not found at ${targetPath}`));
+    process.exit(1);
+  }
+
+  console.log(chalk.blue(`Validating ${path.relative(process.cwd(), manifestPath)}...`));
+
+  let manifest;
+  try {
+    manifest = await fs.readJson(manifestPath);
+  } catch (err) {
+    console.error(chalk.red(`❌ Invalid JSON: ${err.message}`));
+    process.exit(1);
+  }
+
+  const errors = [];
+  const warnings = [];
+
+  // Check required fields
+  for (const field of REQUIRED_FIELDS) {
+    if (!manifest[field]) {
+      errors.push(`Missing required field: "${field}"`);
+    }
+  }
+
+  // Validate category
+  if (manifest.category && !VALID_CATEGORIES.includes(manifest.category)) {
+    warnings.push(`Unknown category "${manifest.category}". Valid: ${VALID_CATEGORIES.join(', ')}`);
+  }
+
+  // Validate version format (semver-ish)
+  if (manifest.version && !/^\d+\.\d+\.\d+/.test(manifest.version)) {
+    warnings.push(`Version "${manifest.version}" should follow semver (x.y.z)`);
+  }
+
+  // Check dependencies
+  if (manifest.dependencies && typeof manifest.dependencies !== 'object') {
+    errors.push('"dependencies" must be an object');
+  }
+
+  // Report
+  if (errors.length === 0 && warnings.length === 0) {
+    console.log(chalk.green('✅ Valid manyplug.json'));
+    console.log(chalk.gray(`   Name: ${manifest.name}`));
+    console.log(chalk.gray(`   Version: ${manifest.version}`));
+    console.log(chalk.gray(`   Category: ${manifest.category}`));
+    return;
+  }
+
+  for (const error of errors) {
+    console.error(chalk.red(`❌ ${error}`));
+  }
+
+  for (const warning of warnings) {
+    console.warn(chalk.yellow(`⚠️  ${warning}`));
+  }
+
+  if (errors.length > 0) {
+    process.exit(1);
+  }
+}