Add CurseForge modpack support

[Copilot]

Extends the tool to process CurseForge modpacks with parity to existing Modrinth integration.

API Integration

• CurseForge API client with search, modpack fetch, file listing, and download URL resolution
• Environment-based authentication via CURSEFORGE_API_KEY
• Single-emission warning for missing API key

Pack Processing

process_curseforge_pack(
    modpack_id=123456,
    file_id=789012,  # Optional, defaults to latest
    output_file="server-pack.zip",
    dry_run=False
)

• Downloads and parses CurseForge manifest.json format
• Fetches individual mod JARs via API (projectID + fileID pairs)
• Applies existing Fabric/Forge client-side detection
• Preserves overrides, repacks as server-ready .zip
• Parallel mod processing with progress callbacks

CLI & GUI

• CLI: --curseforge-id / -c with optional --file-id for version selection
• GUI: CurseForge mode radio button, ID input, file dropdown, search dialog with logo previews
• Worker threads maintain UI responsiveness

Implementation Notes

• Optional mods now checked for sidedness rather than auto-skipped (server-side optional mods are valid)
• Version string filtering handles empty strings safely (v and v[0].isdigit())
• API key warning shown once per session to avoid log spam

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• docs.curseforge.com
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

implement modpacks from curseforge

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