Smart quotation marks “A” and typography

[jimcarst]

Is your feature request related to a problem? Please describe.
When entering text with quotes, they remain "flat".

Describe the solution you'd like
An option to enable smart quotes that converts "this" to “this”, 'this' to ‘this’ and don't to don’t.

Describe alternatives you've considered
Entering these characters manually by long pressing the " and ' buttons.
Several other keyboards offer this functionality.

[jimcarst]

In addition for this, allow for some other automatic typography substitutions:

• "A" to “A” ( or „A” in some languages)
• 'A' to ‘A’
• << A >> to «A»
• -- to –
• --- to —
• ... to …

More inspiration here