Add Chinese language 添加中文

[Firfr]

添加了中文本地化
Added Chinese localization.

[Firfr]

Add the new translation for "redirection-host.forward-http-code".

[nginxproxymanagerci]

CI Error:

/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
certbot-node: Pulling from nginxproxymanager/nginx-full
Digest: sha256:7100001931e29fb7c3446885d8a82e081d967677bdde5be4b493ffbfac11cbfc
Status: Image is up to date for nginxproxymanager/nginx-full:certbot-node
docker.io/nginxproxymanager/nginx-full:certbot-node
�[1;34m❯ �[1;36mTesting backend ...�[0m
yarn install v1.22.22
[1/4] Resolving packages...
[2/4] Fetching packages...
warning lru.min@1.1.2: The engine "bun" appears to be invalid.
warning lru.min@1.1.2: The engine "deno" appears to be invalid.
[3/4] Linking dependencies...
warning " > @apidevtools/swagger-parser@10.1.1" has unmet peer dependency "openapi-types@>=7".
[4/4] Building fresh packages...
Done in 7.84s.
yarn run v1.22.22
$ biome lint .
Checked 84 files in 28ms. No fixes applied.
Done in 0.10s.
�[1;34m❯ �[1;32mTesting Complete�[0m
�[1;34m❯ �[1;36mBuilding ...�[0m
ERROR: failed to build: DeadlineExceeded: context deadline exceeded

[jc21]

Closing this PR, I've created a new one with the conflicts resolved: #4921