Feature/install modpack

[natsurainko]

PR-Codex overview

This PR focuses on enhancing the Natsurainko.FluentCore codebase by improving documentation, refactoring progress reporting mechanisms, and introducing new data structures for modpack management.

Detailed summary

• Updated documentation comments for clarity.
• Refactored progress reporting to use IInstallerProgress.
• Added new resource types in CurseForgeResourceType and ModrinthResourceType.
• Introduced CurseForgeModpackManifest and ModrinthModpackManifest classes.
• Enhanced IDownloader interface with new properties.
• Improved error handling in authentication exceptions.
• Refactored file management logic in mod installation processes.
• Streamlined HTTP request handling in CurseForgeClient and ModrinthClient.

The following files were skipped due to too many changes: Natsurainko.FluentCore/GameManagement/Installer/ForgeInstanceInstaller.cs, Natsurainko.FluentCore/Experimental/GameManagement/Installer.Modpack/ModrinthModpackInstaller.cs, Natsurainko.FluentCore/Experimental/GameManagement/Installer.Modpack/CurseForgeModpackInstaller.cs

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