feat(colors): added more color schemes in Teams theme

[mnajdova]

Added yellow, green, orange, pink, onyx, silver and amethyst color schemas

[codecov]

Codecov Report

Merging #1826 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master    #1826   +/-   ##
=======================================
  Coverage   69.64%   69.64%           
=======================================
  Files         874      874           
  Lines        7610     7610           
  Branches     2242     2215   -27     
=======================================
  Hits         5300     5300           
  Misses       2302     2302           
  Partials        8        8

Impacted Files	Coverage Δ
...ges/react/src/themes/teams-high-contrast/colors.ts	100% <ø> (ø)	⬆️
packages/react/src/themes/teams/colors.ts	77.77% <100%> (+1.3%)	⬆️
packages/react/src/themes/teams-dark/colors.ts	100% <100%> (ø)	⬆️

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