Stella: all versions and old releases

A new major release of Stella is now available; first time in over two years! Here are some of the changes:
- Enhanced ROM launcher to allow multiple images per ROM.
- Made heaps of additional images available for the ROM launcher.
- Added searching by filename for ROM launcher images.
- Added option to start random ROM.
- Added automatically enabled phosphor modes.
- Enhanced Game Properties dialog for multigame ROMs.
- Added 2nd UI theme and hotkey for toggling UI theme.
- Added bezel support (incl. Sinden Lightgun).
- Added optional type format detection based on colors used.
- Added Joy2B+ controller support.
- Added auto detection for QuadTari attached controllers.
- Enhanced Kid Vid support to play tape audio.
- Added port selection, used for controller default mapping.
- Added missing PlusROM support for E7 bankswitching.
- Enhanced movie cart (MVC) support.
- Accelerated emulation up to ~15% (ARM).
- Added limited GameLine Master Module bankswitching support.
- Added 03E0 bankswitching for Brazilian Parker Bros ROMs.
- Added WF8 bankswitching used by some certain Coleco white carts.
- Added JANE bankswitching used by Coleco's Tarzan prototype.
- Added ELF mapper for Mattress Monkeys.
- Added BUS bankswitching support for some older demos.
- Fixed broken 7800 pause key support.
- Added developer option for random hotspot peek values.
- Added user defined CPU cycle timers to debugger.
- Removed 'launcherroms' option, since it was causing some issues.
- Codebase now uses C++20 features, which means a minimum of gcc-11
or clang-10 for Linux/Mac, and Visual Studio 2022 for Windows.
-Have fun!