feat(mime): support webmanifest

[sushichan044]

ref: #3736 (comment)

The web manifest is an important file in explaining information to browsers when installing a website as a PWA.

The specification recommends that this file should be associated with application/manifest+json or some other JSON-like MIME type, but hono does not currently support this.
This PR will resolve it.

[note]
I think no special action is needed for @hono/noder-server as hono is marked as peerDependencies in it.

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

All modified and coverable lines are covered by tests ✅

Project coverage is 91.29%. Comparing base (4b20956) to head (4fee360).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #4085    +/-   ##
========================================
  Coverage   91.29%   91.29%            
========================================
  Files         168      168            
  Lines       10766    10767     +1     
  Branches     3177     3045   -132     
========================================
+ Hits         9829     9830     +1     
  Misses        936      936            
  Partials        1        1            

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[yusukebe]

LGTM!

[yusukebe]

Hey @sushichan044

Looks good! This is a feat PR, but the update is slight. So, I may merge this and include this change as a patch release. I'll decide and merge. Thanks!