feature #51351 [AssetMapper] Add command to download missing downloaded packages (jmsche)

This PR was squashed before being merged into the 6.4 branch.

Discussion
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[AssetMapper] Add command to download missing downloaded packages

| Q             | A
| ------------- | ---
| Branch?       | 6.4
| Bug fix?      | no
| New feature?  | yes
| Deprecations? | no
| Tickets       | N/A
| License       | MIT
| Doc PR        | None yet

Hi, this PR adds a `importmap:install` command to download all packages marked as downloaded in the `impormap.php` file that are missing on filesystem.

To quote `@weaverryan`:

> the intention is to allow devs to not commit `assets/vendor/`, which means that this is a command you’ll run during deploy and your teammates will run

Commits
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a82a42914b [AssetMapper] Add command to download missing downloaded packages

Author: nicolas-grekas

Resources/config/asset_mapper.php

@@ -19,6 +19,7 @@
 use Symfony\Component\AssetMapper\Command\AssetMapperCompileCommand;
 use Symfony\Component\AssetMapper\Command\DebugAssetMapperCommand;
 use Symfony\Component\AssetMapper\Command\ImportMapExportCommand;
+use Symfony\Component\AssetMapper\Command\ImportMapInstallCommand;
 use Symfony\Component\AssetMapper\Command\ImportMapRemoveCommand;
 use Symfony\Component\AssetMapper\Command\ImportMapRequireCommand;
 use Symfony\Component\AssetMapper\Command\ImportMapUpdateCommand;
@@ -202,5 +203,9 @@
         ->set('asset_mapper.importmap.command.export', ImportMapExportCommand::class)
             ->args([service('asset_mapper.importmap.manager')])
             ->tag('console.command')
+
+        ->set('asset_mapper.importmap.command.install', ImportMapInstallCommand::class)
+            ->args([service('asset_mapper.importmap.manager')])
+            ->tag('console.command')
     ;
 };

composer.json

@@ -37,7 +37,7 @@
         "doctrine/persistence": "^1.3|^2|^3",
         "seld/jsonlint": "^1.10",
         "symfony/asset": "^5.4|^6.0|^7.0",
-        "symfony/asset-mapper": "^6.3|^7.0",
+        "symfony/asset-mapper": "^6.4|^7.0",
         "symfony/browser-kit": "^5.4|^6.0|^7.0",
         "symfony/console": "^5.4.9|^6.0.9|^7.0",
         "symfony/clock": "^6.2|^7.0",
@@ -79,6 +79,7 @@
         "phpdocumentor/reflection-docblock": "<3.2.2",
         "phpdocumentor/type-resolver": "<1.4.0",
         "symfony/asset": "<5.4",
+        "symfony/asset-mapper": "<6.4",
         "symfony/clock": "<6.3",
         "symfony/console": "<5.4",
         "symfony/dotenv": "<5.4",