chore: Explicit .gitignore rules for macOS and Windows generated files

[frantovar]

Description:

When creating a new Flutter project with the cli the default .gitignore includes explicit rules for ios/ and android/ generated files. However, it seems to lack equally explicit rules for common generated files within the macos/ and windows/ directories.

I've noticed that when I added a package with native dependencies to my project (e.g., package_info_plus).

I think the next files should not be tracked in Git for macOS and Windows:

macOS:

• macos/Flutter/*.xcconfig (e.g., Flutter-Debug.xcconfig, Flutter-Release.xcconfig)
• macos/Flutter/GeneratedPluginRegistrant.swift
• macos/Runner.xcworkspace/contents.xcworkspacedata (and potentially other generated files within .xcworkspace/ that are not xcshareddata).

Windows:

• windows/flutter/generated_plugin_registrant.cc
• windows/flutter/generated_plugin_registrant.h
• windows/flutter/generated_plugins.cmake

Thank you @marcossevilla for considering this improvement!

Requirements

• No functional changes to the code.
• All CI/CD checks are passing.
• There is no drop in the test coverage percentage.

Additional Context

No response

[marcossevilla]

hey @frantovar, thanks for submitting this issue!

I was checking what is the .gitignore from a flutter create project and I have this from 3.32.0:

# linux/.gitignore
flutter/ephemeral

# macos/.gitignore
# Flutter-related
**/Flutter/ephemeral/
**/Pods/

# Xcode-related
**/dgph
**/xcuserdata/

# windows/.gitignore
flutter/ephemeral/

# Visual Studio user-specific files.
*.suo
*.user
*.userosscache
*.sln.docstates

# Visual Studio build-related files.
x64/
x86/

# Visual Studio cache files
# files ending in .cache can be ignored
*.[Cc]ache
# but keep track of directories ending in .cache
!*.[Cc]ache/

Which seems to be pretty aligned with what we already have on very_good_core. So I'm curious of what are the reasons to ignore the files you're mentioning, particularly the generated plugin registrant files since they can have custom platform logic.