Fix test file path resolution for WASM/Android/Linux CI

Settings.projectRoot now uses a 3-strategy fallback matching the SyndiKit
pattern: working directory first (reliable for WASM/Android/SPM), then
#filePath-relative (macOS/Linux CI), then walking up parent directories.

Add android-copy-files to copy Documentation.docc to the Android emulator's
working directory so the path resolution finds the files via Strategy 1.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: leogdion

.github/workflows/SyntaxKit.yml

@@ -264,6 +264,7 @@ jobs:
           android-swift-version: ${{ matrix.swift.version }}
           android-api-level: ${{ matrix.android-api-level }}
           android-run-tests: true
+          android-copy-files: Sources/SyntaxKit/Documentation.docc
       - name: Upload coverage to Codecov
         if: steps.build.outputs.contains-code-coverage == 'true'
         uses: codecov/codecov-action@v6

Tests/SyntaxDocTests/Settings.swift

@@ -8,14 +8,36 @@
 import Foundation
 
 internal enum Settings {
-  /// Project root directory calculated from the current file location
+  /// Project root directory calculated with a 3-strategy fallback for cross-platform support
   internal static let projectRoot: URL = {
-    let currentFileURL = URL(fileURLWithPath: #filePath)
-    return
-      currentFileURL
+    // Strategy 1: Working directory (most reliable for SPM/WASM/Android)
+    let workingDir = URL(fileURLWithPath: FileManager.default.currentDirectoryPath)
+    if FileManager.default.fileExists(atPath: workingDir.appendingPathComponent("Sources").path) {
+      return workingDir
+    }
+
+    // Strategy 2: Source-relative via #filePath (macOS/Linux CI)
+    let sourceRelative = URL(fileURLWithPath: #filePath)
       .deletingLastPathComponent()  // Tests/SyntaxDocTests
       .deletingLastPathComponent()  // Tests
       .deletingLastPathComponent()  // Project root
+    if FileManager.default.fileExists(
+      atPath: sourceRelative.appendingPathComponent("Sources").path)
+    {
+      return sourceRelative
+    }
+
+    // Strategy 3: Walk up from working directory (nested execution contexts)
+    var search = workingDir
+    for _ in 0..<4 {
+      if FileManager.default.fileExists(atPath: search.appendingPathComponent("Sources").path) {
+        return search
+      }
+      search = search.deletingLastPathComponent()
+    }
+
+    // Fallback — will produce a clear error if Sources/ is still not found
+    return sourceRelative
   }()
 
   /// Document paths to search for documentation files