Add docs to Bool+Require

Author: insidegui

Sources/BuddyFoundation/Foundation/Bool+Require.swift

@@ -1,4 +1,7 @@
 public extension Bool {
+    /// Throws an error if the bool value is `false`.
+    /// - Parameter error: The error to throw if the value is `false`.
+    /// - Returns: `true` if the value was true (discardable result).
     @discardableResult
     func require(_ error: Error) throws -> Self {
         guard self else { throw error }