Implement async event streaming

Sources/Inotify/InotifyEvent.swift

@@ -0,0 +1,26 @@
+import SystemPackage
+
+public struct InotifyEvent: Sendable, Hashable, CustomStringConvertible {
+	public let watchDescriptor: Int32
+	public let mask: InotifyEventMask
+	public let cookie: UInt32
+	public let path: FilePath
+
+	public var description: String {
+		var parts = ["InotifyEvent(wd: \(watchDescriptor), mask: \(mask), path: \"\(path)\""]
+		if cookie != 0 { parts.append("cookie: \(cookie)") }
+		return parts.joined(separator: ", ") + ")"
+	}
+}
+
+extension InotifyEvent {
+	public init(from rawEvent: RawInotifyEvent, inDirectory path: String) {
+		let dirPath = FilePath(path)
+		self.init(
+			watchDescriptor: rawEvent.watchDescriptor,
+			mask: rawEvent.mask,
+			cookie: rawEvent.cookie,
+			path: dirPath.appending(rawEvent.name)
+		)
+	}
+}