feat:[JIRA:HCPSDKFIORIUIKIT-2210] Add custom colors to FUIColorStyle

[KevinZK]

adding 6 new colors to FUIColorStyle. These colors will be used to enable custom branding for specific UI Elements via nss file

[cla-assistant[bot]]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
2 out of 3 committers have signed the CLA.

:white_check_mark: billzhou0223
:white_check_mark: KevinZK
:x: c5342342

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