Add initial JavaScript/TypeScript support

Add JS/TS support to `versa install`.

Run `npm install`, `yarn` or `pnpm install` based on which files are
present in the project.

src/Console/Command/AbstractCommand.php

@@ -16,6 +16,14 @@ abstract class AbstractCommand extends Command
             description: 'Any additonal arguments to pass to the command.',
         );
 
+        $this->addOption(
+            name: 'language',
+            shortcut: 'l',
+            mode: InputArgument::OPTIONAL,
+            description: 'The project language',
+            suggestedValues: ['php', 'javascript'],
+        );
+
         $this->addOption(
             name: 'type',
             shortcut: 't',

src/Console/Command/InstallCommand.php

@@ -2,10 +2,12 @@
 
 namespace App\Console\Command;
 
+use App\Enum\ProjectLanguage;
 use App\Process\Process;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Filesystem\Filesystem;
 
 final class InstallCommand extends AbstractCommand
 {
@@ -14,9 +16,17 @@ final class InstallCommand extends AbstractCommand
         $extraArgs = $input->getOption('extra-args');
         $workingDir = $input->getOption('working-dir');
 
+        // TODO: What to do if a project contains multiple languages?
+        // e.g. a composer.lock file (PHP) and pnpm-lock.yaml file (JS)?
+
+        // TODO: validate the language is an allowed value.
+
         // TODO: Composer in Docker Compose?
         $process = Process::create(
-            command: ['composer', 'install'],
+            command: $this->getCommand(
+                language: $input->getOption('language'),
+                workingDir: $workingDir,
+            ),
             extraArgs: $extraArgs,
             workingDir: $workingDir,
         );
@@ -26,4 +36,27 @@ final class InstallCommand extends AbstractCommand
 
         return Command::SUCCESS;
     }
+
+    /**
+     * @param non-empty-string $language
+     * @param non-empty-string $workingDir
+     * @return non-empty-array<int, non-empty-string>
+     */
+    private function getCommand(string $language, string $workingDir): array
+    {
+        $filesystem = new Filesystem();
+
+        if ($language === ProjectLanguage::JavaScript->value) {
+            if ($filesystem->exists($workingDir.'/yarn.lock')) {
+                return ['yarn'];
+            } elseif ($filesystem->exists($workingDir.'/pnpm-lock.yaml')) {
+                return ['pnpm', 'install'];
+            } else {
+                return ['npm', 'install'];
+            }
+        }
+
+        return ['composer', 'install'];
+    }
+
 }

src/Enum/ProjectLanguage.php

@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Enum;
+
+enum ProjectLanguage: string
+{
+    case JavaScript = 'javascript';
+    case PHP = 'php';
+}