Add skill for addressing comments

[alexr00]

No description provided.

[Copilot]

Pull request overview

Adds a new language-model “skill” aimed at guiding an agent through addressing review comments on the active pull request, and extends the github-pull-request_activePullRequest tool to optionally refresh PR data and surface an update timestamp.

Changes:

• Add address-pr-comments skill documentation and register it in package.json.
• Extend github-pull-request_activePullRequest with an optional refresh input and add lastUpdatedAt to the JSON output.
• Switch webpack.config.js TypeScript config resolution from invoking yarn to npx.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.

File	Description
webpack.config.js	Changes the command used to run tsc --showConfig during webpack config resolution.
src/lm/tools/activePullRequestTool.ts	Adds optional refresh behavior and returns an additional timestamp field in the tool result.
src/lm/skills/address-pr-comments/SKILL.md	Introduces a new skill playbook for working through PR review comments.
package.json	Registers the new skill and declares an inputSchema for the active PR tool (refresh).

Comments suppressed due to low confidence (1)

src/lm/tools/activePullRequestTool.ts:50

• This tool accepts structured input now; consider typing the invocation options as vscode.LanguageModelToolInvocationOptions<PullRequestToolParams> instead of any to keep the implementation aligned with the inputSchema and avoid unsound casts.

	async invoke(options: vscode.LanguageModelToolInvocationOptions<any>, _token: vscode.CancellationToken): Promise<vscode.ExtendedLanguageModelToolResult | undefined> {
		let pullRequest = this._findActivePullRequest();

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