feat: batch deletion of multiple connections

[Copilot]

PR #398 accumulated 1552 commits and 683 "changed files" due to a merge commit (9527c415) that pulled in historical branches via a second parent. The actual diff against next is 2 files.

This PR documents the clean implementation and provides the force-push path to restore PR #398 to a 2-file diff.

Changes

• removeConnection.ts — Accepts optional nodes?: DocumentDBClusterItem[] for tree-view multi-select; falls back to single node for backward compatibility

  • Pre-flight loop: checks all selected connections for running tasks before prompting
  • Confirmation message adapts: single name vs. Delete {count} connections?
  • Resilient deletion loop — continues on individual failure, logs each via ext.outputChannel.error
  • Telemetry: connectionsToDelete, connectionsDeleted, errorCount; last error captured in properties.error/errorMessage with a comment noting the intentional single-capture
  • Warns via ext.outputChannel.warn when invoked with no selection instead of silently returning

• l10n/bundle.l10n.json — Five new strings: multi-delete confirmation, partial-failure summary, success summary, per-connection error, and empty-selection warning

Recovering PR #398

The branch dev/tnaum/connection-multi-delete needs a force-push to expose the clean 2-file diff:

git fetch origin
git checkout dev/tnaum/connection-multi-delete
git reset --hard origin/next
git cherry-pick 62d739b9        # the clean feature commit
git push --force-with-lease origin dev/tnaum/connection-multi-delete

[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

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• https://api.github.com/user
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