docs(vuepress): add docs website

[dsseng]

TODO:

• Set Vuepress up
• Create base files
• Acquire a domain: https://onyxjs.github.io/onyx
• Make website deployable
• Create base files for 🇷🇺 translation
• Add lint
• Document @onyxjs/matchers
  • Matchers root page
  • All the matchers
    • toBe
    • toBeDefined
    • toBeFalse
    • toBeInstanceOf
    • toBeNaN
    • toBeNull
    • toBeTrue
    • toBeTypeOf
    • toBeUndefined
    • toContain
    • toEqual
    • toHaveLength
    • toStrictlyEqual
    • toThrow
  • expect
  • Usage examples
  • Translations
    • 🇷🇺
    • ...
• Document @onyxjs/mock
  • mock
  • spy
  • watch
  • Usage examples
  • Translations
    • 🇷🇺
    • ...

[codecov]

Codecov Report

Merging #7 into master will increase coverage by 1.27%.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           master     #7      +/-   ##
========================================
+ Coverage   98.72%   100%   +1.27%     
========================================
  Files          24     18       -6     
  Lines         236     79     -157     
  Branches       45     15      -30     
========================================
- Hits          233     79     -154     
+ Misses          3      0       -3

Impacted Files	Coverage Δ
packages/matchers/src/expect.ts	100% <0%> (ø)	⬆️
packages/mock/src/mock.ts	100% <0%> (ø)	⬆️
packages/matchers/src/toThrow.ts	100% <0%> (ø)	⬆️
packages/core/src/result.ts
packages/mock/src/mockMatchers.ts
packages/matchers/src/matchers.ts
packages/core/src/suite.ts
packages/core/src/interface.ts
packages/core/src/runnable.ts

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