MP3 player + Root menu multi-keybinding + NeoUI minor changes

[nullsystem]

Description

• Main root menu now responds to neo_mp3 bind
• NeoUI::ProgressDrag fix not immediately responding on click
• New NeoUI::Bind for named keybinds

Toolchain

• Linux GCC Distro Native Arch/GCC 15

[Rainyan]

I'm unsure whether this is working correctly since I don't really know what the expected behavior is, but I'm seeing the following:

• When entering neo_mp3 in the dev console, the main menu music either stops playing or resumes playing - is this intended?
• When binding bind p "neo_mp3" and pressing the keyboard key P in the main menu, nothing happens - is this intended?

[nullsystem]

@Rainyan

• neo_mp3 is now changed to just doing pause/play music toggle so that's expected.
• I think that was down to gameuifuncs->GetButtonCodeForBind not supporting multiple bindings so whatever it think is first is picked up instead. This is also noted as a TODO in neo_root.cpp regarding keys.bcConsole. Could try to do a workaround which was already present for the settings menu where all keys were checked and put into a hashtable: htAllBinds variable in neo_root_settings.cpp but hashtable updated limited to like a InstallChangeCallback

[nullsystem]

@Rainyan I've updated how the root main menu deal with keybinds: a132708
Now it's able to deal with multiple keybinds, but I had ended up limiting the console's keybind setting UI due to unable with getting the toggleconsole enforce to deal with multiple binds. It already had that issue to prior to this PR.