REQUEST: command line switch to start game in paused state (--paused)

Use Case: For arcade cores, I like to display the game-specific controls via an overlay using overlay_next and use a mapped button/key to switch between normal bezel and the same bezel that shows controls. This same button is also mapped to the 'pause' function.

I would like to start the game in a paused state and display the controls overlay/bezel. When the overlay_next button (also pause) is invoked, the game is unpaused and the normal bezel is displayed (transparent in the center). At any time during gameplay, the user can then use the overlay_next button to pause the game and show the controls.

This solution works well ATM (demo screen running in background) but would be optimal if the game could start in a paused state.

Start by tracing RetroArch's command-line option parsing and the startup path that initializes the game pause state. Confirm how the existing pause function and overlay_next behavior are represented. Done means a --paused switch starts the game paused while preserving normal pause and overlay behavior.