Add Windows Docs

Sources/SwiftGodot/SwiftGodot.docc/SwiftGodot.md

@@ -43,6 +43,7 @@ Going in depth with SwiftGodot:
 ### Platform Integration
 
 - <doc:iOS>
+- <doc:Windows>
 
 ### Godot Nodes
 

Sources/SwiftGodot/SwiftGodot.docc/Windows.md

@@ -0,0 +1,46 @@
+# Using SwiftGodot on Windows
+
+## Extension Dependencies
+
+Since Swift is not a system component on Windows, you will need to make a copy
+of the Swift runtime libraries that you use, and place those side-by-side the
+extension that you created.
+
+On Windows, you can use the `dumpbin /dependents` command to see which which
+libraries you need, like this:
+
+```
+C:\project> dumpbin /dependents MyExtension.dll
+Image has the following dependencies:
+
+    SwiftGodot.dll
+    swiftCore.dll
+    swift_Concurrency.dll
+    swiftWinSDK.dll
+    swiftSwiftOnoneSupport.dll
+    swiftCRT.dll
+    KERNEL32.dll
+    VCRUNTIME140.dll
+    api-ms-win-crt-runtime-l1-1-0.dll
+```
+
+Those files are typically located in `AppData\Local\Programs\Swift\Runtimes`.
+
+## Debug Symbols
+
+On Windows, if you want to get debug symbols in the Windows Native format, build
+your extension like this:
+
+```
+C:\project> swift build -debug-info-format codeview 
+```
+## Using Relative Paths
+
+On Windows, you can use relative paths to reference your library, so you do not
+need to copy binaries to your game when making changes, like this:
+
+```
+windows.x86_64.release = "../../../project/.build/release/SandboxSwift.dll"
+windows.x86_64.debug = "../../../project/.build/debug/SandboxSwift.dll"
+```
+