- Adding StdOutLogger and adding tests for DAG execution to verify it works.

- Roughing in FileSystemLogger
- Deleting Scheduler code and associated unit tests as being too complicated for maintenance.
- Refactoring namespaces for loggers and executors.

tests/unit_scheduler.cpp

@@ -1,25 +0,0 @@
-#include <iostream>
-#include <filesystem>
-
-#include "daggy/executors/ForkingTaskExecutor.hpp"
-#include "daggy/Scheduler.hpp"
-
-#include "catch.hpp"
-
-TEST_CASE("Basic Scheduler Execution", "[scheduler]") {
-  daggy::executor::ForkingTaskExecutor ex(10);
-  daggy::Scheduler sched(ex);
-
-  std::vector<daggy::Task> tasks {
-    daggy::Task{ "task_a", { "/usr/bin/echo", "task_a"}, 3, 30, { "task_c"} }
-     , daggy::Task{ "task_b", { "/usr/bin/echo", "task_b"}, 3, 30, { "task_c" } }
-     , daggy::Task{ "task_c", { "/usr/bin/echo", "task_c"}, 3, 30, {} }
-  };
-
-  SECTION("Simple Run") {
-    auto fut_a = sched.scheduleDAG("Simple 1", tasks, {});
-    auto fut_b = sched.scheduleDAG("Simple 2", tasks, {});
-    fut_a.get();
-    fut_b.get();
-  }
-}