Added "Add Game" button function (#33)

* All games will be linked

* feat: Add 'Add Game' button to Settings tab

- Added 'Add Game' button to Games to Watch section in Settings
- Implemented logic to add custom games via search input
- Fixed alignment issue with games filter search bar
- Added English translations for new UI elements

* fix PR 33 review issues

---------

Co-authored-by: ethanblazkowicz <wow990922@outlook.com>
Co-authored-by: LeonSparta <46887992+LeonSparta@users.noreply.github.com>
Co-authored-by: Fengqing Liu <fq_aaron@hotmail.com>

lang/العربية.json

@@ -133,6 +133,8 @@
             "games_to_watch": "ألعاب للمشاهدة",
             "games_help": "حدد الألعاب للمشاهدة. الترتيب مهم - اسحب لإعادة ترتيب الأولوية (الأعلى = أعلى أولوية).",
             "search_games": "البحث عن الألعاب...",
+            "add_game": "Add Game",
+            "add_game_hint": " Click \"Add Game\" to add it manually.",
             "select_all": "تحديد الكل",
             "deselect_all": "إلغاء تحديد الكل",
             "selected_games": "الألعاب المحددة (اسحب لإعادة الترتيب)",