Add music symbols to the symbols dictionary

[LeonarddeR]

Link to issue number:

Fixes #9138

Summary of the issue:

Music symbols, such as ♭ (flat), ♮ (natural) and ♯ (sharp) aren't spoken by NVDA.

Description of how this pull request fixes the issue:

Adds the mentioned symbols to the symbols list.

Testing performed:

Tested by arrowing over the symbols.

Known issues with pull request:

None

Change log entry:

Unicode music symbols (such as natural, flat and sharp) are now spoken appropriately. (#9138)

[tobyrush]

I'm relatively new to GitHub so I don't know the proper protocol, but would it be possible to include double sharp (𝄪) and double flat (𝄫) as well? The characters are U+1D12A and U+1D12B respectively.

My apologies if this should be posted elsewhere.

[jage9]

We have a variety of symbols that are not covered by emoji but are still missing. This is one category. We can do this peace meal, or perhaps there is a more comprehensive approach? There are more math symbols missing as well as well as likely other specialized categories.

[LeonarddeR]

I'm going to close this one for now, as first, I believe we need to reach consensus about which symbols belong in to core and how to integrate them properly. It makes sense to add many symbols in one wave, instead of only three or four per pull request.

[shoogle]

There's no real need to provide speech for any musical symbols except the ones in this PR and those mentioned in #9158. Accidentals (including doubles) are pretty much the only Unicode music symbols used by actual sheet music software (the remaining symbols come from SMuFL). The basic note symbols see some use in text chat, forums, subtitles for videos (but not in music software since it uses values from SMuFL). No other musical symbols are commonly used by any popular program, musical or otherwise.