Add auto-refresh configuration for pull requests queries

[Copilot]

Adds githubPullRequests.queries.refreshInterval setting to automatically refresh pull request queries at a specified interval (in minutes). Setting to 0 disables auto-refresh.

Changes

• Configuration (package.json, package.nls.json)

  • New setting: githubPullRequests.queries.refreshInterval (number, default: 0)
  • Minimum enforced interval: 5 minutes to prevent excessive API calls

• Implementation (src/view/prsTreeDataProvider.ts)

  • Timer lifecycle management with configuration change listener
  • Automatic cleanup on disposal
  • Reuses existing refreshAllQueryResults() with cache clearing

// Example usage in VS Code settings:
{
  "githubPullRequests.queries.refreshInterval": 10  // Refresh every 10 minutes
}

Setting values less than 5 are clamped to the 5-minute minimum. The timer respects configuration changes immediately without requiring restart.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Allow auto refresh of the pull requests</issue_title>
<issue_description>Please add a new configuration option to automatically refresh the queries in the pull requests section, so there is no need to refresh them manually.

This configuration option should be a number: 0 means no auto-refresh, while a positive value is the refresh rate.
</issue_description>

<agent_instructions>Add the pull requests view refresh frequency setting for a number of minutes. Don't allow it to be less than 5 minutes. </agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Allow auto refresh of the pull requests #6129

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