Extend Spacing foundation to spacing-950

[pseys]

As part of the Pokemon project we have identified the need to extend the spacing foundation. Instead of stopping at --spacing-400, the foundation should increase to --spacing-950

Token	HD	MD	TD	LD
--spacing-450	18	36	54	72
--spacing-500	20	40	60	80
--spacing-550	22	44	66	88
--spacing-600	24	48	72	96
--spacing-650	26	52	78	104
--spacing-700	28	56	84	112
--spacing-750	30	60	90	120
--spacing-800	32	64	96	128
--spacing-850	34	68	102	136
--spacing-900	36	72	108	144
--spacing-950	38	76	114	152

This change needs to be made in code and in Figma.

[mark-tate]

added to support pokemon
Basil Goal: to extend tokens and to be published through foundation docs

[mark-tate]

working through other token issues and hope to get to this by EOS

[mark-tate]

PR to be raised by next standup

Spacing foundation docs complete and will be merged alongside change

[mark-tate]

Oregano Goal: will be released by end of wk 1

[pseys]

The changes have been made in a Figma branch. As soon as they are pushed in code I'll publish them in Figma.