feat: add sync, update, and remove commands

- sync: scans plugins and updates registry.json
- update: checks and updates plugins to match registry
- remove: removes installed plugin with --yes and --remove-deps options
- registry.json stored at project root with plugin metadata and _sourcePath

bin/manyplug.js

@@ -6,6 +6,9 @@ import { initCommand } from '../src/commands/init.js';
 import { installCommand } from '../src/commands/install.js';
 import { listCommand } from '../src/commands/list.js';
 import { validateCommand } from '../src/commands/validate.js';
+import { syncCommand } from '../src/commands/sync.js';
+import { updateCommand } from '../src/commands/update.js';
+import { removeCommand } from '../src/commands/remove.js';
 
 const require = createRequire(import.meta.url);
 const pkg = require('../package.json');
@@ -28,6 +31,14 @@ program
   .option('-g, --global', 'Install to global registry')
   .action(installCommand);
 
+program
+  .command('remove <plugin>')
+  .alias('rm')
+  .description('Remove an installed plugin')
+  .option('-y, --yes', 'Skip confirmation prompt')
+  .option('--remove-deps', 'Also remove npm dependencies')
+  .action(removeCommand);
+
 program
   .command('list')
   .alias('ls')
@@ -35,6 +46,17 @@ program
   .option('-a, --all', 'Include disabled plugins')
   .action(listCommand);
 
+program
+  .command('sync')
+  .description('Sync registry.json with installed plugins')
+  .action(syncCommand);
+
+program
+  .command('update [plugin]')
+  .description('Update plugins to match registry versions')
+  .option('-a, --all', 'Update all plugins (default if no name given)')
+  .action(updateCommand);
+
 program
   .command('validate [path]')
   .description('Validate manyplug.json syntax')