Add query parameters to customize Voicing features

[jessegreenberg]

We would like to make several public query parameters that customize the initial state of Voicing features. This came up in the context of an upcoming Voicing Report, which describes the featuer and its use cases in detail. We discussed the following query parameters, which are intended to be user friendly. They will support teachers and students loading sims with accessible configurations without requiring the student to navigate the Preferences dialog.

?voicingInitiallyEnabled - enables voicing on load with default settings
?voicingAddObjectResponses - enables object responses on load
?voicingAddContextResponses - enables context responses on load
?voicingAddHintResponses - enables hint responses on load
?voicingCollapseVoicingToolbar - loads with the voicing toolbar collapsed
?voicingRemoveVoicingToolbar - loads with the voicing toolbar removed

We discussed that browser audio auto play policy may sometimes prevent this from working smoothly on all platforms (especially Safari). But it is worth it to add them and make them available so that they can be used where possible. I will add them now and then we will add them to published Voicing sims in maintenance releases.

[jessegreenberg]

Ill review this with @terracoda before next steps.

[terracoda]

We can remove the second "Voicing":

?voicingCollapseToolbar - loads with the voicing toolbar collapsed
?voicingRemoveToolbar - loads with the voicing toolbar removed

[jessegreenberg]

Next steps:

• Ill change the query parameters as described
• @terracoda will test
• Then Ill add in a MR for Coicing sims
• Then @terracoda will update teacher tips to describe this (possibly in a separate issue)

[jessegreenberg]

Rename is done, ready for @terracoda to verify.

[jessegreenberg]

@terracoda reviewed and said they are good to go.