feat(jira): add custom field support

[du00cs]

Description

add custom fields and an auto mode for jira issue query

Related issue:

Type of Change

• 🐛 Bug fix
• ✨ New feature
• 🌐 New site adapter
• 📝 Documentation
• ♻️ Refactor
• 🔧 CI / build / tooling

Checklist

• I ran the checks relevant to this PR
• I updated tests or docs if needed
• I included output or screenshots when useful

Documentation (if adding/modifying an adapter)

• Added doc page under docs/adapters/ (if new adapter)
• Updated docs/adapters/index.md table (if new adapter)
• Updated sidebar in docs/.vitepress/config.mts (if new adapter)
• Updated README.md / README.zh-CN.md when command discoverability changed
• Used positional args for the command's primary subject unless a named flag is clearly better
• Normalized expected adapter failures to CliError subclasses instead of raw Error

Screenshots / Output

specified fieds output

- key: ...
  id: '...'
  url: ...
  summary: ''
  labels: []
  description:
    raw: null
    markdown: ''
  comments: []
  attachments: []
  linkedIssues: []
  fixVersions: []
  affectedVersions: []
  components: []
  customFields:
    <field>:
      self: ...
      value: ...
      id: '...'
      disabled: false

auto fields output example

- key: ...
  id: '6773462'
  url: ...
  summary: ...
  issueType: ...
  status: ...
  priority: ...
  project: ...
  reporter: ...
  assignee: ...
  labels:
    - ...
  description:
    raw: "..."
    markdown:

       ‌
  comments:
    - id: '8172270'
      author: ...
      created: 2026-08-06T15:45:23.000+0800
      updated: 2026-08-06T15:45:23.000+0800
      markdown: "..."
    - id: '8172447'
      ...
    - id: '8172528'
      ...
  attachments:
    - id: '3121904'
       ...