add spawn ads (#1228)

## Description:

Adds a bottom rail add during the spawn phase if player has played over
5 games.
Also only show the death screen ad if player has played a couple of
games.

This keeps the experience ad-free for the first few games.
<img width="1003" alt="74fb6676-273d-4b58-9fcb-50ec438c4e27"
src="https://github.com/user-attachments/assets/fedca20f-7b31-4a06-be57-bde5bd0118f0"
/>

## 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
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

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

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

src/client/index.html

@@ -283,7 +283,6 @@
         style="pointer-events: auto"
       >
         <control-panel></control-panel>
-        <left-in-game-ad></left-in-game-ad>
       </div>
     </div>
 
@@ -368,6 +367,7 @@
     <unit-info-modal></unit-info-modal>
     <news-modal></news-modal>
     <game-left-sidebar></game-left-sidebar>
+    <spawn-ad></spawn-ad>
     <div
       id="language-modal"
       class="fixed inset-0 bg-black bg-opacity-50 z-50 hidden flex justify-center items-center"