fix(docc): resolve documentation build permissions issue

- Clean up existing directories before building to avoid permission conflicts
- Fix --allow-writing-to-directory path to match output path
- Remove @preconcurrency attributes that are unused on macOS with Swift 5.9

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: guitaripod

.github/workflows/docc.yml

@@ -37,16 +37,19 @@ jobs:
         # Build documentation
         swift package resolve
         
+        # Clean up any existing directories
+        rm -rf docs-temp deployment
+        
+        # Create deployment directory
+        mkdir -p deployment
+        
         # Generate documentation archive
-        swift package --allow-writing-to-directory ./docs \
+        swift package --allow-writing-to-directory ./docs-temp \
           generate-documentation --target SpeedrunKit \
           --output-path ./docs-temp \
           --transform-for-static-hosting \
           --hosting-base-path 'SpeedrunKit'
         
-        # Create deployment directory
-        mkdir -p deployment
-        
         # Copy DocC generated content first
         cp -r docs-temp/* deployment/
         

Sources/SpeedrunKit/API/SpeedrunConfiguration.swift

@@ -1,4 +1,4 @@
-@preconcurrency import Foundation
+import Foundation
 
 /// Configuration for the Speedrun API client
 public struct SpeedrunConfiguration: Sendable {

Sources/SpeedrunKit/Networking/URLSessionNetwork.swift

@@ -1,6 +1,6 @@
-@preconcurrency import Foundation
+import Foundation
 #if canImport(FoundationNetworking)
-@preconcurrency import FoundationNetworking
+import FoundationNetworking
 #endif
 
 // MARK: - Platform-specific URLSession async support