feat: initialize project with Symfony, React, and Tailwind CSS setup

- Add package.json with development and production dependencies
- Create postcss.config.js for Tailwind CSS integration
- Implement AdminController for handling admin routes
- Add admin index template with React root element
- Create base template for consistent layout
- Configure TypeScript with tsconfig.json
- Set up Webpack configuration for asset management

config/reference.php

@@ -1436,6 +1436,57 @@ use Symfony\Component\Config\Loader\ParamConfigurator as Param;
  *         }>,
  *     },
  * }
+ * @psalm-type StimulusConfig = array{
+ *     controller_paths?: list<scalar|Param|null>,
+ *     controllers_json?: scalar|Param|null, // Default: "%kernel.project_dir%/assets/controllers.json"
+ * }
+ * @psalm-type ReactConfig = array{
+ *     controllers_path?: scalar|Param|null, // The path to the directory where React controller components are stored - relevant only when using symfony/asset-mapper. // Default: "%kernel.project_dir%/assets/react/controllers"
+ *     name_glob?: list<scalar|Param|null>,
+ * }
+ * @psalm-type WebpackEncoreConfig = array{
+ *     output_path?: scalar|Param|null, // The path where Encore is building the assets - i.e. Encore.setOutputPath()
+ *     crossorigin?: false|"anonymous"|"use-credentials"|Param, // crossorigin value when Encore.enableIntegrityHashes() is used, can be false (default), anonymous or use-credentials // Default: false
+ *     preload?: bool|Param, // preload all rendered script and link tags automatically via the http2 Link header. // Default: false
+ *     cache?: bool|Param, // Enable caching of the entry point file(s) // Default: false
+ *     strict_mode?: bool|Param, // Throw an exception if the entrypoints.json file is missing or an entry is missing from the data // Default: true
+ *     builds?: array<string, scalar|Param|null>,
+ *     script_attributes?: array<string, scalar|Param|null>,
+ *     link_attributes?: array<string, scalar|Param|null>,
+ * }
+ * @psalm-type TwigConfig = array{
+ *     form_themes?: list<scalar|Param|null>,
+ *     globals?: array<string, array{ // Default: []
+ *         id?: scalar|Param|null,
+ *         type?: scalar|Param|null,
+ *         value?: mixed,
+ *     }>,
+ *     autoescape_service?: scalar|Param|null, // Default: null
+ *     autoescape_service_method?: scalar|Param|null, // Default: null
+ *     base_template_class?: scalar|Param|null, // Deprecated: The child node "base_template_class" at path "twig.base_template_class" is deprecated.
+ *     cache?: scalar|Param|null, // Default: true
+ *     charset?: scalar|Param|null, // Default: "%kernel.charset%"
+ *     debug?: bool|Param, // Default: "%kernel.debug%"
+ *     strict_variables?: bool|Param, // Default: "%kernel.debug%"
+ *     auto_reload?: scalar|Param|null,
+ *     optimizations?: int|Param,
+ *     default_path?: scalar|Param|null, // The default path used to load templates. // Default: "%kernel.project_dir%/templates"
+ *     file_name_pattern?: string|list<scalar|Param|null>,
+ *     paths?: array<string, mixed>,
+ *     date?: array{ // The default format options used by the date filter.
+ *         format?: scalar|Param|null, // Default: "F j, Y H:i"
+ *         interval_format?: scalar|Param|null, // Default: "%d days"
+ *         timezone?: scalar|Param|null, // The timezone used when formatting dates, when set to null, the timezone returned by date_default_timezone_get() is used. // Default: null
+ *     },
+ *     number_format?: array{ // The default format options for the number_format filter.
+ *         decimals?: int|Param, // Default: 0
+ *         decimal_point?: scalar|Param|null, // Default: "."
+ *         thousands_separator?: scalar|Param|null, // Default: ","
+ *     },
+ *     mailer?: array{
+ *         html_to_text_converter?: scalar|Param|null, // A service implementing the "Symfony\Component\Mime\HtmlToTextConverter\HtmlToTextConverterInterface". // Default: null
+ *     },
+ * }
  * @psalm-type ConfigType = array{
  *     imports?: ImportsConfig,
  *     parameters?: ParametersConfig,
@@ -1447,6 +1498,10 @@ use Symfony\Component\Config\Loader\ParamConfigurator as Param;
  *     lexik_jwt_authentication?: LexikJwtAuthenticationConfig,
  *     nelmio_cors?: NelmioCorsConfig,
  *     nelmio_api_doc?: NelmioApiDocConfig,
+ *     stimulus?: StimulusConfig,
+ *     react?: ReactConfig,
+ *     webpack_encore?: WebpackEncoreConfig,
+ *     twig?: TwigConfig,
  *     "when@dev"?: array{
  *         imports?: ImportsConfig,
  *         parameters?: ParametersConfig,
@@ -1460,6 +1515,10 @@ use Symfony\Component\Config\Loader\ParamConfigurator as Param;
  *         debug?: DebugConfig,
  *         maker?: MakerConfig,
  *         nelmio_api_doc?: NelmioApiDocConfig,
+ *         stimulus?: StimulusConfig,
+ *         react?: ReactConfig,
+ *         webpack_encore?: WebpackEncoreConfig,
+ *         twig?: TwigConfig,
  *     },
  *     "when@prod"?: array{
  *         imports?: ImportsConfig,
@@ -1472,6 +1531,10 @@ use Symfony\Component\Config\Loader\ParamConfigurator as Param;
  *         lexik_jwt_authentication?: LexikJwtAuthenticationConfig,
  *         nelmio_cors?: NelmioCorsConfig,
  *         nelmio_api_doc?: NelmioApiDocConfig,
+ *         stimulus?: StimulusConfig,
+ *         react?: ReactConfig,
+ *         webpack_encore?: WebpackEncoreConfig,
+ *         twig?: TwigConfig,
  *     },
  *     "when@test"?: array{
  *         imports?: ImportsConfig,
@@ -1484,6 +1547,10 @@ use Symfony\Component\Config\Loader\ParamConfigurator as Param;
  *         lexik_jwt_authentication?: LexikJwtAuthenticationConfig,
  *         nelmio_cors?: NelmioCorsConfig,
  *         nelmio_api_doc?: NelmioApiDocConfig,
+ *         stimulus?: StimulusConfig,
+ *         react?: ReactConfig,
+ *         webpack_encore?: WebpackEncoreConfig,
+ *         twig?: TwigConfig,
  *     },
  *     ...<string, ExtensionType|array{ // extra keys must follow the when@%env% pattern or match an extension alias
  *         imports?: ImportsConfig,