feat(helper/factory): Calculate Context<Env> Type in createHandlers

[sushichan044]

closes #3467

This PR fixes a problem in createHandlers where the expected type information was not passed to subsequent handlers when middlewares changed the Context type.

The author should do the following, if applicable

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

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 91.70%. Comparing base (082862b) to head (087c5df). Report is 2 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #3670 +/- ## ======================================= Coverage 91.70% 91.70% ======================================= Files 159 159 Lines 10145 10145 Branches 2851 2857 +6 ======================================= Hits 9303 9303 Misses 840 840 Partials 2 2 ```

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[yusukebe]

@sushichan044

Awesome! Thank you for your first contribution. Merging now.

[mecab]

I raised #3467 and I'm so happy to hear it is fixed. It is super helpful. I will try it soon.

Thank you @sushichan044 and @yusukebe !

[Rykuno]

I brought this issue up in the discord. Thank you!