docs: add missing docs for global config endpoints

[abzy128]

Issue for this PR

Closes #24949

Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

What does this PR do?

I have been using opencode server and controlling it remotely with API based on info on docs. I have pulled the repo and let 5.4 analyze the hono server and found out that /global/config is undocumented. So, I updated the docs with 5.4 and changes in this PR showcase it.

How did you verify your code works?

It is not code change, only docs. I did PATCH /config and PATCH /global/config to test out my theories before

Screenshots / recordings

no ui changes, only docs.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

[github-actions]

Hey! Your PR title add missing docs for global config endpoints doesn't follow conventional commit format.

Please update it to start with one of:

• feat: or feat(scope): new feature
• fix: or fix(scope): bug fix
• docs: or docs(scope): documentation changes
• chore: or chore(scope): maintenance tasks
• refactor: or refactor(scope): code refactoring
• test: or test(scope): adding or updating tests

Where scope is the package name (e.g., app, desktop, opencode).

See CONTRIBUTING.md for details.

[abzy128]

should I update docs for i18n languages too? I can only translate and verify en and ru

[abzy128]

I also went through other hono updates, but not sure if it should be in scope of this PR (abzy128#1)

[abzy128]

currently patching and getting global config of server running in container is working and I am happy)

curl -s http://localhost:4096/global/config -u "opencode:$OPENCODE_PASSWORD" | jq

{
  "$schema": "https://opencode.ai/config.json",
  "enabled_providers": [
    "anthropic",
    "openai"
  ],
  "model": "openai/gpt-5.4",
  "small_model": "openai/gpt-5.4-mini"
}