[FR] Implement toast notification indicating current running operation

[mystyq]

Checks

• I have checked existing OPL feature requests for duplicates and found none

Describe the FR

Trying to pinpoint an issue (presumably with the SDK) related to building the game cache and loading the game list into memory, where the loading icon lags (some long running operation blocking the GUI), I had an idea about how it would be helpful to have some sort of toast notifications to see what is happening behind the scenes.

Describe the solution you'd like

Instead of assuming the behavior is related an IO process, it would help to see more determinate information. Having strategic toast notification messages could help to communicate issues and speed up the process of trying to search for areas of improvement.

Describe alternatives you've considered

No response

Additional context

No response