all: add console and logging machinery

src/ex/root.zig

@@ -4,7 +4,12 @@ pub const private = @import("private.zig");
 const p = private;
 
 pub const WorkItem = p.workqueue.WorkItem;
+pub const Console = p.console.Console;
 
 pub const workqueue = struct {
     pub const enqueue = p.workqueue.enqueue;
 };
+
+pub const console = struct {
+    pub const register = p.console.register;
+};