Slider UI change (#2148)

## Description:

1. adds feature so when making single player server, bots amount can be
determined by slider and manual
1-1.
[video](https://github.com/user-attachments/assets/23186592-2330-478b-8f73-313ca073803b)

## Please complete the following:

- [X] I have added screenshots for all UI updates
- [X] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [X] I have added relevant tests to the test directory
- [X] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

jack_45183

---------

Co-authored-by: evanpelle <evanpelle@gmail.com>

resources/lang/en.json

@@ -132,6 +132,10 @@
     "info_enemy_panel": "Enemy info panel",
     "exit_confirmation": "Are you sure you want to exit the game?"
   },
+  "slider": {
+    "label": "Bots:",
+    "disabled": "Disabled"
+  },
   "single_modal": {
     "title": "Single Player",
     "allow_alliances": "Allow alliances",

resources/lang/ko.json

@@ -132,6 +132,10 @@
     "enables_title": "설정 활성화",
     "start": "게임 시작하기"
   },
+  "slider": {
+    "label": "봇:",
+    "disabled": "사용 안 함"
+  },
   "map": {
     "map": "지도",
     "world": "세계",