Migrate frontend to TypeScript with Deno-based tooling (#206)

Compiles assets/*.ts via sensiolabs/typescript-bundle (standalone SWC
binary) and adds Deno for formatting, linting, type-checking, and
tests, keeping the project's no-Node/npm approach intact. Wires all
four into CI, the Justfile, and the pre-commit hook.

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "ccae654dd9c952e8920d9cb9c0f35ff5",
+    "content-hash": "cca03585c291226d36bbeabf57a08bec",
     "packages": [
         {
             "name": "composer/pcre",
@@ -2751,6 +2751,62 @@
             },
             "time": "2019-03-08T08:55:37+00:00"
         },
+        {
+            "name": "sensiolabs/typescript-bundle",
+            "version": "v0.2.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sensiolabs/AssetMapperTypeScriptBundle.git",
+                "reference": "b4a498a2b1dd699fd4ea95ae9dfa30ebe77cc8ce"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sensiolabs/AssetMapperTypeScriptBundle/zipball/b4a498a2b1dd699fd4ea95ae9dfa30ebe77cc8ce",
+                "reference": "b4a498a2b1dd699fd4ea95ae9dfa30ebe77cc8ce",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1",
+                "symfony/asset-mapper": "^6.3|^7.0|^8.0",
+                "symfony/console": "^6.3|^7.0|^8.0",
+                "symfony/http-client": "^6.3|^7.0|^8.0",
+                "symfony/process": "^6.3|^7.0|^8.0"
+            },
+            "require-dev": {
+                "phpstan/phpstan": "^1",
+                "phpstan/phpstan-symfony": "^1.3",
+                "phpunit/phpunit": "^10.5",
+                "symfony/filesystem": "^6.3|^7.0|^8.0",
+                "symfony/framework-bundle": "^6.3|^7.0|^8.0"
+            },
+            "type": "symfony-bundle",
+            "autoload": {
+                "psr-4": {
+                    "Sensiolabs\\TypeScriptBundle\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Maelan LE BORGNE",
+                    "homepage": "https://github.com/maelanleborgne"
+                }
+            ],
+            "description": "TypeScript support for Symfony + AssetMapper",
+            "homepage": "https://github.com/sensiolabs/AssetMapperTypeScriptBundle",
+            "keywords": [
+                "asset-mapper",
+                "typescript"
+            ],
+            "support": {
+                "issues": "https://github.com/sensiolabs/AssetMapperTypeScriptBundle/issues",
+                "source": "https://github.com/sensiolabs/AssetMapperTypeScriptBundle/tree/v0.2.2"
+            },
+            "time": "2025-08-28T10:10:44+00:00"
+        },
         {
             "name": "sentry/sentry",
             "version": "4.29.0",