Delimiter pairs

[AndreasArvidsson]

1. Adds a Talon list defining delimiter pairs
2. Adds a voice command to insert delimiter pairs
3. Adds a voice command to wrap selection with delimiter pairs
4. Extends compound edit command to wrap with delimiter pairs

These are the spoken forms I personal use (except for padding). Do we want to use something else?

What do we do with all the existing symbol commands?
https://github.com/talonhub/community/blob/bb240ba1cf958bd3e2c7791e5a57d09d205adc81/plugin/symbols/symbols.talon#L10-L45

Fixes #546

[nriley]

Please move the additional ways to insert delimiters into a separate file, remove those that have spoken forms equivalent to the once being introduced and deprecate all the rest.

[AndreasArvidsson]

Changes performed. Also migrated deprecated symbol commands to a separate file and called the deprecated command action.

[knausj85]

There is one subtlety with the new wrap command versus the deprecated commands:
the cursor winds up within the delimiters when wrapping; previously, the cursor would wind up outside. I'm not entirely sure this change is undesirable. If the intent is to replace the deprecated commands, should we preserve the previous functionality?

[knausj85]

I suppose there are three scenarios we could cover with the grammar.

1. cursor between the delimiters. Done.
2. Wrapping selection with delimiters. Done, but need to settle the cursor position.
3. Patch in the delimiters, cursor after. I believe this was the original purpose of the "empty " commands, but they no longer behave as such. Should we bother with this?

[AndreasArvidsson]

Personally I prefer the cursor ending up inside but we can change it if people prefer. Should we get a few additional voices on this?

[knausj85]

Yeah, let's see what @nriley and @phillco think :)