Add optional game count text

[Pritchy96]

Pull Request checklist

Note: these are not necessarily requirements

• [x] I reformatted the code with clang-format
• [x] I checked to make sure my submission worked
• [x] I am the author of submission or have permission from the original author
• [ ] Requires update of the PS2SDK or other dependencies
• [ ] Others (please specify below)

Pull Request description

#1145 seemed to be a nice next PR to work on.

Toggleable in display settings, this PR displays the count of games/apps in the top corner.

I fixed the log text from my previous PR as it was incorrect also.

Again, I'm still fairly unfamiliar with this codebase so any changes/suggestions/issues will be well received. One thing I'm particularly unsure of is how exactly the language system works - I'm unsure whether I need to do anything extra in order for this to not break in non English languages, basically. I assume if a string is missing from a language yml it will simply fall back to a default?

I was wondering whether there was a discord etc for this project? It'd be useful to have a place to chat/ask questions outside of these PR threads.

Cheers, Tom