Close #2987: 从 java.io.File 迁移至 NIO

[Glavo]

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[Copilot]

Pull Request Overview

This PR migrates the codebase from using java.io.File to the NIO java.nio.file.Path API, addressing issue #2987. The migration improves code modernization by adopting the more flexible and feature-rich NIO.2 file system API.

• Replaces File API calls with equivalent Path operations throughout the codebase
• Removes deprecated File-based constructors and utility methods
• Updates method signatures to accept Path instead of File parameters

Reviewed Changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
Architecture.java	Updates file existence check to use Files.exists() with Path.of()
Unzipper.java	Removes deprecated File-based constructor
FileUtils.java	Removes toFile() utility method
JsonUtils.java	Removes File type adapter registration
FileTypeAdapter.java	Deletes entire file as it's no longer needed
Launcher.java	Changes makeLaunchScript method signature to accept Path
DefaultLauncher.java	Updates script creation logic to use Path operations
DefaultGameRepository.java	Updates event firing to pass Path instead of File
GameJsonParseFailedEvent.java	Changes field and constructor to use Path
MojangJavaDownloadTask.java	Replaces file operations with NIO equivalents
Multiple UI files	Updates method calls to use Path parameters
ModpackHelper.java	Converts file reading methods to use Path
LauncherHelper.java	Updates script file handling to use Path
HMCLGameLauncher.java	Updates method signature to use Path
Config.java	Removes File type adapter registration

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