Consistent customisable way to use decimals

[auscompgeek]

In the CSS support there's a couple of commands that recognise decimals:

community/lang/css/css.talon

Lines 27 to 29 in d9c6373

	value <user.number_string> [{user.css_unit}]: "{number_string}{css_unit or ''}"
	value <user.number_string> point <digit_string> [{user.css_unit}]:
	"{number_string}.{digit_string}{css_unit or ''}"

This only recognises how decimals are typically taught to be read in English-speaking classrooms (e.g. three point one four for 3.14). Some people might like to be able to dictate the fractional part of decimals like whole numbers though, e.g. twelve point thirty four for 12.34. Others might prefer to say dot instead of point.

We should add a decimal_string capture to allow this to be reused in other commands and customised globally.

[auscompgeek]

Something else just came to mind: not all locales use . for decimals, instead using ,. For programming though we'll still want a way to dictate decimals using . – not sure what the best way to do this is.

[auscompgeek]

Oh, interesting, just took a look at how we do it in dictation mode and we have a similar construction to what we have in CSS:

community/core/text/text_and_dictation.py

Lines 49 to 51 in d9c6373

	@mod.capture(rule="(numb | numeral) <user.number_string> (dot | point) <digit_string>")
	def prose_number_with_dot(m) -> str:
	return m.number_string + "." + m.digit_string

[AndreasArvidsson]

I would just extend the normal number command with this ability. We can either do two separate commands in the Talon file or make a capture that enables both?
eg
https://github.com/AndreasArvidsson/andreas-talon/blob/bd3e75779295d9f139d8bc614ecb54e50899d704/core/numbers/numbers.py#L207-L213