feat(theme): add Vitesse theme inspired by @antfu's antfu/vscode-theme-vitesse

[2u841r]

Description

feat(theme): add Vitesse theme inspired by @antfu's Vitesse Theme

How Has This Been Tested?

• Tested locally with a valid username
• Tested locally with an invalid username
• Ran tests with composer test
• Added or updated test cases to test new features

Checklist:

• I have checked to make sure no other pull requests are open for this issue
• The code is properly formatted and is consistent with the existing code style

Screenshots

Demo

Property	Hex Code
background	#000000
border	#4D9375
stroke	#5D99A9
ring	#4D9375
fire	#CB7676
currStreakNum	#B8A965
sideNums	#4D9375
currStreakLabel	#80A665
sideLabels	#80A665
dates	#BD976A
excludeDaysLabel	#758575

[DenverCoder1]

Looks great! Thanks for contributing! 🎉