fix(utils/ipaddr): support IPv6-mapped IPv4 address

[usualoma]

fixes #3723

Return value of getConniInfo(c)

In all the runtimes, an IPv6-mapped IPv4 address was returned as the remote address, so I think it is appropriate to handle this by fixing convertIPv6BinaryToString.

import { Hono } from './src/'
import { getConnInfo } from './src/adapter/deno/conninfo' // or bun, node-server

export default new Hono().get('/', (c) => {
  return c.json(getConnInfo(c))
})

$ deno serve --unstable-sloppy-imports --host [::] app.ts
$ bun run app.ts

% curl http://[::ffff:127.0.0.1]:8000/
{"remote":{"address":"::ffff:127.0.0.1","port":64504,"transport":"tcp"}}
% curl http://[::ffff:7f00:1]:8000/
{"remote":{"address":"::ffff:127.0.0.1","port":64519,"transport":"tcp"}}

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

[usualoma]

@nakasyou @yusukebe

Would you please review?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.72%. Comparing base (190e122) to head (87bda2d).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3727      +/-   ##
==========================================
+ Coverage   91.70%   91.72%   +0.02%     
==========================================
  Files         159      159              
  Lines       10158    10184      +26     
  Branches     2855     2879      +24     
==========================================
+ Hits         9315     9341      +26     
  Misses        842      842              
  Partials        1        1              

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[nakasyou]

Hi @usualoma, it looks good to me.

[yusukebe]

LGTM!

[yusukebe]

@usualoma

Thanks! Merging now.