Record human/nation/bot conquests (#2949)

## Description:

Conquests are currently mixing all player types.

This is not ideal as people wonders why a 50 player game can lead to
hundred of kills.
Having separate records can also help with achievements and better
balancing.

This PR splits the conquests record into 3 categories: human, nations
and bots.

It is linked to this infra PR:
https://github.com/openfrontio/infra/pull/246

<img width="895" height="497" alt="image"
src="https://github.com/user-attachments/assets/66e49100-8114-4406-84ab-d9627355956d"
/>

While the recorded data make a distinction between bots/nations, it's
only displayed here as a single "bot" category.

## 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:

IngloriousTom

resources/lang/en.json

@@ -233,7 +233,8 @@
     "naval_trade": "Tradeship",
     "conquest_gold": "Conquered player gold",
     "stolen_gold": "Stolen with warships",
-    "num_of_conquests": "Number of conquered players",
+    "num_of_conquests_humans": "Player kills",
+    "num_of_conquests_bots": "Bot kills",
     "duration": "Duration",
     "survival_time": "Survival time",
     "war": "War",