feat(bun/ws): allow to import upgradeWebSocket and websocket directly

[nakasyou]

I've just realized that WebSocket helper didn't require createBunWebSocket to provide functions used to upgrade connections.
This PR allows to write code like the code:

import { upgradeWebSocket, websocket } from 'hono/bun'

app.get('/ws', upgradeWebSocket(...))

export default {
  fetch: app.fetch,
  websocket
}

Codes using a WebSocket with Bun will become simpler than before.

The author should do the following, if applicable

• Add tests
• Run tests
• bun run format:fix && bun run lint:fix to format the code
• Add TSDoc/JSDoc to document the code

[codecov]

Codecov Report

❌ Patch coverage is 88.13559% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.23%. Comparing base (5af4f1f) to head (a176bfc).
⚠️ Report is 1 commits behind head on next.

Files with missing lines	Patch %	Lines
src/utils/color.ts	12.50%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             next    #4242      +/-   ##
==========================================
- Coverage   91.44%   91.23%   -0.21%     
==========================================
  Files         170      170              
  Lines       10881    10884       +3     
  Branches     3103     3077      -26     
==========================================
- Hits         9950     9930      -20     
- Misses        930      953      +23     
  Partials        1        1              

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[yusukebe]

LGTM!

[yusukebe]

Hi @nakasyou

Looks good to me! I'll include this change in the next minor release v4.9 since this is a feat change, and making the method deprecated. If we should hurry, can you tell me so?

[nakasyou]

Hi @yusukebe. Thank you for reviewing. I don't hurry so releasing with v4.9 is good.