Demo programs and general improvements

I added demo programs to scratcher, these show the language actually being used

Try one out! https://scratch.mit.edu/projects/1385339395/

General improvements

• Bug fixes
• Dummy sprite
• Make the type checker ignored in inlined functions
• Make topLevelInit smaller and remove unused functions from final compilation
• TurboWarp specific compilation mode with faster operations on strings/lists (not compatible with vanilla scratch if enabled)