Add configurable Compose task terminal closing

[rtwwhat]

Summary

• Add an advanced containers.closeComposeTaskTerminal setting, disabled by default.
• Apply the setting to Compose commands and Compose group lifecycle actions.
• Map task focus and close presentation options directly so omitted values stay unset and explicit false is preserved.

This incorporates maintainer feedback from #588 / #363: make terminal closing opt-in, keep the default behavior unchanged, and avoid forcing it on for all commands.

Fixes #350

Test plan

• pnpm --filter vscode-containers lint
• pnpm --filter vscode-containers build
• pnpm --filter vscode-containers test (155 passing)
• With containers.closeComposeTaskTerminal enabled: those commands close the terminal when they finish
• Compose Logs stays usable (long-running follow output)

🎥 Video demonstration

https://github.com/user-attachments/assets/2d45bbf0-fb7f-446d-ad6b-55707f454eee

[rtwwhat]

@microsoft-github-policy-service agree

[Copilot]

Pull request overview

This PR updates the Container Tools extension’s Compose group commands to automatically close the VS Code task terminal after the command completes, aligning the UX with VS Code task presentation.close behavior while keeping Compose Logs streaming output visible.

Changes:

• Added a close?: boolean option to TaskCommandRunnerFactory and thread it into task.presentationOptions.close.
• Enabled close: true for Compose group Start, Stop, Restart, and Down commands.
• Left Compose group Logs behavior unchanged so the terminal remains open for streaming output.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
extensions/vscode-containers/src/runtimes/runners/TaskCommandRunnerFactory.ts	Adds a close option and maps it to VS Code task presentationOptions.close.
extensions/vscode-containers/src/commands/containers/composeGroup.ts	Passes close: true for Compose group start/stop/restart/down tasks (logs unchanged).

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[rtwwhat]

Demo of enabled containers.closeComposeTaskTerminal is in the description. Compose commands close the task terminal when they finish. This also includes the later review notes from #588 (setting lookup inlined in composeGroup, nls wording). Ready for review.