Scratch-gui: Add more tutorials

[kyleplo]

Expected Behavior

There are tutorials for a lot of things.

Actual Behavior

Tutorials I would like to see:

• Sound effects
• Broadcasts
• Basic intro to if and if/else
• ask/answer blocks
• Using math in Scratch
• Using logic (or, and, not, >, <, =) in Scratch
• Variables and lists
• Creating a custom block
• Using the vector paint editor
• Using the bitmap paint editor
• Using the sound editor
• Platformer physics (too complex?)
• Music extension tutorial
• Pen extension tutorial
• Video Sensing extension tutorial
• Translate extension tutorial
• Connecting to hardware
• Microbit
• EV3
• Wedo 2.0

Why more tutorials?

Only 33 of the 106 main Scratch blocks show up in tutorials (yes, I counted). That means there are 73 blocks that new Scratchers have no idea how to use.

Steps to Reproduce

Look in the tutorials library

Operating System and Browser

All

[chexbox]

More advanced tutorials would be nice, too.

[thisandagain]

/cc @ntlrsk @kosiecki17

[joker314]

After (and if) this is implemented, an item in the context menu of blocks titled 'Tutorial' would probably be useful for users who aren't sure how to use a block. Clicking it would bring up a list of tutorials which use (or focus on) this block.

[apple502j]

https://scratch.mit.edu/discuss/post/3300175/

can you please make a tutorial on what each control does. I'm so confused.