Update v220831

- Objectives hint system.
- New buildings: electronics factory, machine shop, cistern
- New materials: microprocessor, AI chip
- Bot upgrades
- Bot autonomy: upgraded bots carry out construction tasks autonomously. You no longer have to select bots prior to construction.
- Mines don’t block bot passage.
- Reorganized main menu buttons
- Fullscreen / windowed mode setting
- New “Did you know?” help system
- Increased solar panel charging speed.
- Shortcut keys for quick construction.