feat(less): expose primary palette variables

[SevenOutman]

Primary palette variables (@Hxxx and @Bxxx) were not available in early v5 releases because of the unified stylesheet with dark mode. Now they are available with dark mode specific variables assigned separate names.

Less variable	Description
H050 ~ H900	Highlight levels in light color mode
B050 ~ B900	Gray levels in light color mode
H050-dark ~ H900-dark	Highlight levels in dark color mode
B050-dark ~ B900-dark	Gray levels in dark color mode
H050-high-contrast ~ H900-high-contrast	Highlight levels in high-contrast color mode
B050-high-contrast ~ B900-high-contrast	Gray levels in high-contrast color mode

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Name	Status	Preview	Updated
rsuite-nextjs	✅ Ready (Inspect)	Visit Preview	Jun 7, 2022 at 8:37AM (UTC)

1 Ignored Deployment

Name	Status	Preview	Updated
rsuite-v4	⬜️ Ignored (Inspect)		Jun 7, 2022 at 8:37AM (UTC)

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[codecov]

Codecov Report

Merging #2532 (f51ca85) into main (5669caf) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2532      +/-   ##
==========================================
+ Coverage   85.28%   85.30%   +0.02%     
==========================================
  Files         293      293              
  Lines        9084     9084              
  Branches     2552     2552              
==========================================
+ Hits         7747     7749       +2     
+ Misses        701      700       -1     
+ Partials      636      635       -1     

Flag	Coverage Δ
ChromeCi	85.28% <ø> (ø)
Firefox	85.28% <ø> (?)

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Impacted Files	Coverage Δ
src/utils/useRootClose.ts	84.00% <0.00%> (+8.00%)	⬆️

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