ci: add issue labeler

[JaronZ]

No description provided.

[Copilot]

Pull Request Overview

This PR adds an automated issue labeling system using GitHub Actions to automatically categorize newly opened issues based on their content.

• Introduces a GitHub Actions workflow that triggers on issue creation
• Adds configuration for labeling issues based on package/modpack type mentioned in issue templates

Reviewed Changes

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

File	Description
.github/workflows/issue-triage.yml	Creates the GitHub Actions workflow for automated issue labeling
.github/issue-labeler.yml	Defines labeling rules based on issue content patterns

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