fix: read parent hierarchy with shift+i

[maribethb]

The basics

• I validated my changes

The details

Resolves

Fixes part of RaspberryPiFoundation/blockly-keyboard-experimentation#764

Proposed Changes

• Changes the whereami shortcut shift+i to read out the full hierarchy of how the current block is connected
• Adds a new "minimal" mode for aria labels that doesn't include the information about having inputs, shadow blocks, etc.
• Does some kinda gross stuff to account for the fact that the aria label for blocks with value inputs already includes the text of connected blocks

Reason for Changes

Lets you hear the full context of how the current block is connected

The code that computes the ariaLabel 100% needs to be refactored, but I don't think it's worth doing that until after we find out if people actually want this particular shortcut.

Test Coverage

In lieu of tests, please accept these screenshots

Documentation

Additional Information

[maribethb]

if someone smarter than me knows why closure compiler said

computeAriaLabel(
    verbose: boolean = false,
    minimal: boolean = false,
    currentBlock?: this,
  ):

this had an error because optional arguments have to go at the end, but only when you run with the debug flag npm run build -- --debug

I am pretty sure that what I've done now is functionally equivalent but cc doesn't yell at me now