Add NOTE about dispatchMain

Author: Cyberbeni

README.md

@@ -19,4 +19,3 @@ As of Swift 6.0.1, `Locale.current` is hardcoded to be `en_001` on Linux. Manual
 ## TODOs
 
 - TODO: Use base docker image that already includes static Linux SDK.
-- TODO: Don't depend on `Foundation`, importing `FoundationEssentials` instead would result in a smaller binary size. `RunLoop` and other useful classes, like `Process`, can only be accessed through `Foundation` currently.

Sources/ExampleApp/main.swift

@@ -1,3 +1,4 @@
+import Dispatch
 import Foundation
 #if canImport(SwiftGlibc)
 	@preconcurrency import SwiftGlibc
@@ -32,4 +33,6 @@ let signalHandlers = [
 	return signalSource
 }
 
+// NOTE: RunLoop is required for some classes, like Timer.
+// If you don't want to import Foundation (to decrease binary size), you can use `dispatchMain()`
 RunLoop.main.run()