Number (figure zero) Spacing vs Capital Letters - 8pt opsz - all weights all widths

A repeated explanation for context: Because numbers are read individually and letters are mostly not the spacing of numbers should be slightly more generous than capital letters.

This is a note about if that's happening the right amount or not

**Regular width**
wght:400|wdth:100|slnt:0|GRAD:0|opsz:8
We should definitely add some space between the zeros because they read as closer than a pair of Hs or Os, which we want to avoid. I wish the zero wasn't so utterly hugely different. In 8 opsz the problem is even worse than 14. _No fixes to these numbers should be done without adjusting the zero as a steady reference._

wght: 100 | wdth: 100 | slnt: 0 | GRAD: 0 | opsz: 8
Even better than 400 because the counter is closer in brightness to the O and the spacing is right. With spacing fixes to individual letters, this will be ok.

wght: 900 | wdth: 100 | slnt: 0 | GRAD: 0 | opsz: 8
This one is quite problematic. Not only is the stoke too heavy in relation to the capitals, but the spacing is also much too tight. When seen in body text, numbers seem to clump up. _No fixes to these numbers should be done without adjusting the zero as a steady reference._

**Narrow width**
wght:400|wdth:25|slnt:0|GRAD:0|opsz:8
This zero needs more space around it a more generous counter. _No fixes to these numbers should be done without adjusting the zero as a steady reference._

wght: 100 | wdth: 25 | slnt: 0 | GRAD: 0 | opsz: 8
This looks almost Ok but the space around zero needs to be tightened slightly. _No fixes to these numbers should be done without adjusting the zero as a steady reference._

wght: 900 | wdth: 25 | slnt: 0 | GRAD: 0 | opsz: 8
This one is quite problematic. The stoke is too heavy in relation to the capitals and the spacing is also much too tight. When seen in body text, numbers seem to clump up. _No fixes to these numbers should be done without adjusting the zero as a steady reference._

**Wide width**
wght:400|wdth:151|slnt:0|GRAD:0|opsz:8
Zero is not wide enough and the spacing is too tight. _No fixes to these numbers should be done without adjusting the zero as a steady reference._

wght: 100 | wdth: 151 | slnt: 0 | GRAD: 0 | opsz: 8
This looks almost Ok but the space around zero needs to be tightened slightly. The Zero also feels not quite wide enough. _No fixes to these numbers should be done without adjusting the zero as a steady reference._

wght:900|wdth:151|slnt:0|GRAD:0|opsz:8
Zero is not wide enough and the spacing is too tight. _No fixes to these numbers should be done without adjusting the zero as a steady reference._

I am leaving out the slanted for now because Santiago asked us to wait for the update.