remove hard-coded layout names

Sources/phbar/Models/PHConfig.swift

@@ -8,4 +8,18 @@ struct PHConfig: Decodable {
 		case theme, window, layout
 		case monitors = "monitor"
 	}
+
+	var layouts: Set<String> {
+		var layouts = Set<String>()
+		layouts.insert(layout)
+
+		guard let monitors else { return layouts }
+		for monitor in monitors.values {
+			if let layout = monitor.layout {
+				layouts.insert(layout)
+			}
+		}
+
+		return layouts
+	}
 }

Sources/phbar/Models/PHLayout/PHLayout+Loading.swift

@@ -4,7 +4,7 @@ import TOML
 extension PHLayout {
 	/// Load the specified layouts from the resolved config directory (see `PHPaths`).
 	/// If any of theme doesn't exist or fails to parse, the execution is interrupted.
-	static func load(_ layouts: [String]) throws -> [String: PHLayout] {
+	static func load(_ layouts: Set<String>) throws -> [String: PHLayout] {
 		var dictionary = [String: PHLayout]()
 
 		for layout in layouts {
@@ -29,8 +29,8 @@ extension PHLayout {
 				       Make sure to have a file named `\(layout)` inside the
 				       directory: `\(PHPaths.layoutsDirectory.relativePath)`
 
-				Tip: If you've never used phbar before, run the `phbar install` command
-				     to automatically generate all the required configuration files.
+				Tip: If you've never used phbar before, run `phbar generate config`
+				     to automatically generate the required configuration files.
 				"""
 			)
 		}