refactor[epic-games]: migrate to GraphQL API and modularize authentication logic

This commit refactors epic-games.js to use the GraphQL API instead of the legacy promotions endpoint for retrieving free games. Key architectural improvements include:

- Added modular authentication module (device-auths.ts) supporting persistent device auth tokens
- Introduces cookie management module (cookie.ts) for persistent session handling
- Extracts GraphQL query structures and API endpoints into constants.ts
- Implements multiple fallback strategies: device auth login, token exchange, and fallback to standard login
- Adds support for both GraphQL and promotions-based game discovery
- Streamlines claim process with improved tracking and error handling
- Removes legacy selectors and redundant logic

Additionally, updates package.json to include TypeScript and reorganizes dependency order for better maintainability.

package-lock.json

@@ -22,7 +22,8 @@
       },
       "devDependencies": {
         "@stylistic/eslint-plugin-js": "^4.2.0",
-        "eslint": "^9.26.0"
+        "eslint": "^9.26.0",
+        "typescript": "^5.9.3"
       },
       "engines": {
         "node": ">=17"
@@ -2876,6 +2877,20 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/typescript": {
+      "version": "5.9.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
+      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=14.17"
+      }
+    },
     "node_modules/universalify": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/universalify/-/universalify-2.0.1.tgz",
@@ -4863,6 +4878,12 @@
         "mime-types": "^3.0.0"
       }
     },
+    "typescript": {
+      "version": "5.9.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
+      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
+      "dev": true
+    },
     "universalify": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/universalify/-/universalify-2.0.1.tgz",