Replace karma with vitest

[hackerwins]

What this PR does / why we need it?

This is a PR for revising the codes included in #655.

Switching test framework to vitest from karma.

karma is deprecated and no longer maintained and It's hard to configure and slower than other modern test frameworks. vitest is one of the fastest modern testing frameworks and can be used with a near-zero configuration, that is why I chose it.

for this pull request, I did the following things:

• Changes from feat: switching test framework to vitest #655 (9a17ca2)
  • karma, mocha, sinon and chai are removed and replaced with vitest
  • Changed to use vi.fn() instead of sinon.spy()
  • Changed to use vi.fn().mockImplementation instead of sinon.stub().callsFake()
  • Changed to use task.name instead of this.test!.title (to get the title of current test)
  • Changed to inject the yorkie rpc address for testing as an environment variable
• Fixed XMLHttpRequest mock. not using sinon anymore (ea879a2)
• Using a customized jsdom Vitest environment to prevent the implementation of the Uint8Array from being overwritten via jsdom (c8eb684)

Any background context you want to provide?

What are the relevant tickets?

Fixes #654

Checklist

• Added relevant tests or not required
• Didn't break anything

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (0eaab11) 89.16% compared to head (14b15e9) 71.33%.

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #665       +/-   ##
===========================================
- Coverage   89.16%   71.33%   -17.84%     
===========================================
  Files          79       58       -21     
  Lines        9318     8734      -584     
  Branches      856      784       -72     
===========================================
- Hits         8308     6230     -2078     
- Misses        697     2245     +1548     
+ Partials      313      259       -54     

Files	Coverage Δ
src/document/presence/presence.ts	100.00% <ø> (ø)
src/client/client.ts	75.34% <66.66%> (+0.26%)	⬆️

... and 42 files with indirect coverage changes

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