feat: implement task sorting with --sort flag (#1105)

* refactor: move deepcopy into its own package

* feat: add generic orderedmap implementation

* refactor: implement tasks with orderedmap

* feat: implement sort flag for all task outputs

* refactor: implement vars with orderedmap

* chore: docs

* fix: linting issues

* fix: non deterministic behavior in tests

task_test.go

@@ -790,7 +790,7 @@ func TestTaskVersion(t *testing.T) {
 			}
 			require.NoError(t, e.Setup())
 			assert.Equal(t, test.Version, e.Taskfile.Version)
-			assert.Equal(t, 2, len(e.Taskfile.Tasks))
+			assert.Equal(t, 2, e.Taskfile.Tasks.Len())
 		})
 	}
 }