feat(macOS): Consolidated Xcode Workspace (#9435)

- Derived data directory ".xcode" for Xcode workspace in project root.
- Mac crafter build directory ".mac-crafter" in project root.
- Added all Swift packages and Xcode projects to workspace.
- Added some important top-level files and other directories.
- Removed obsolete Xcode workspace in shell integration directory.
- Removed obsolete OwnCloudFinderSync folder.
- Updated AGENTS.md.
- Updated README.md.

Signed-off-by: Iva Horn <iva.horn@nextcloud.com>

Author: i2h3

.gitignore

@@ -92,7 +92,6 @@ dlldata.c
 # macOS specific
 xcuserdata/
 **/.DS_Store
-**/Carthage/
 
 # Visual C++ cache files
 ipch/
@@ -196,8 +195,11 @@ convert.exe
 theme.qrc
 *.AppImage
 
-# Xcode Build Artifacts
-DerivedData
-
 # Swift Package Manager Build Artifacts
 .swiftpm_codeql_detected_source_root
+
+# Relative derived data of Xcode workspace
+.xcode
+
+# Mac-Crafter build directory
+.mac-crafter

AGENTS.md

@@ -23,9 +23,12 @@ Other platforms like iOS and Android are irrelevant for this project.
 
 | Directory       | Description                                         | Agent Action         |
 |-----------------|-----------------------------------------------------|----------------------|
+| `./admin`       | Platform-specific build, packaging, and distribution tooling (macOS, Windows, Linux, Nix) | Ignore unless packaging or installer logic must be updated |
 | `./admin/osx/mac-crafter` | Build tool for macOS | Ignore unless the build process must be updated |
 | `./shell_integration/MacOSX/NextcloudIntegration` | Xcode project for macOS app extensions | Look here first for changes in context of the file provider extension |
-| `./translations` | Translation files from Transifex.                   | Do not modify        |
+| `./translations` | Translation files from Transifex.                   | Do not modify |
+| `.mac-crafter` | Build artifacts and derived data. | Ignore |
+| `.xcode` | Build artifacts and derived data. | Ignore |
 
 ## General Guidance
 

Nextcloud Desktop Client.xcworkspace/contents.xcworkspacedata

@@ -1,8 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
-<dict>
-	<key>IDEDidComputeMac32BitWarning</key>
-	<true/>
-</dict>
+<dict/>
 </plist>