Scottish Gaelic locale issues

[leedriscoll]

Since we've started using date-fns for Scottish Gaelic dates on the BBC News website in production. We've found a number issues that we need fixed.

1. 'o chionn' suffix to should actually be a prefix
11 diogan o chionn -> o chionn 11 diogan
1 diog o chionn -> o chionn 1 diog

2. We should be using the modern version of days / day
7 làithean o chionn -> o chionn 7 là
1 latha o chionn -> o chionn 1 là

3. Incorrect Seconds/Minutes/Hour for the 1, 2,20:
Seconds
20 diogan -> o chionn 20 diog
2 diogan -> o chionn 2 dhiog

Minutes
20 mionaidean o chionn -> o chionn 20 mionaid
2 mionaidean o chionn -> o chionn 2 mhionaid

Hours
20 uairean de thìde o chionn -> o chionn 20 uair de thìde
2 uairean de thìde o chionn -> o chionn 2 uair de thìde
1 uair o chionn -> o chionn 1 uair de thìde

4. Ordinal Indicators
1st – We've checked the latest guidance from the Gaelic Orthographic Conventions group and they have dropped the ‘c’ from
31st – works in the same way as 11th, so that should be be ‘31mh’
3rd – bundled it in with ‘mh’ so it now ‘3mh’, ‘13mh’, ‘23mh’.
12th – needs to be ‘12na’