Move everything under the guecs/ directory in src/ so that it meshes better with other projects.

tests/dbc.cpp

@@ -1,5 +1,5 @@
 #include <catch2/catch_test_macros.hpp>
-#include "dbc.hpp"
+#include "guecs/dbc.hpp"
 
 using namespace dbc;
 

tests/guecs.cpp

@@ -1,9 +1,10 @@
 #include <catch2/catch_test_macros.hpp>
 #include <fmt/core.h>
-#include "guecs.hpp"
+#include "guecs/ui.hpp"
 #include <fmt/xchar.h>
 
 using namespace guecs;
 
 TEST_CASE("prototype one gui", "[ecs-gui]") {
+  // accidentally gutted, will recover later
 }

tests/lel.cpp

@@ -1,4 +1,4 @@
-#include "lel.hpp"
+#include "guecs/lel.hpp"
 #include <catch2/catch_test_macros.hpp>
 #include <fmt/core.h>
 #include <string>

tests/shaders.cpp

@@ -1,7 +1,7 @@
 #include <catch2/catch_test_macros.hpp>
 #include <fmt/core.h>
 #include <string>
-#include "sfmlbackend/shaders.hpp"
+#include "guecs/sfml/shaders.hpp"
 
 using namespace fmt;
 

tests/sound.cpp

@@ -1,7 +1,7 @@
 #include <catch2/catch_test_macros.hpp>
 #include <fmt/core.h>
 #include <string>
-#include "sfmlbackend/sound.hpp"
+#include "guecs/sfml/sound.hpp"
 
 using namespace fmt;
 

tests/textures.cpp

@@ -1,7 +1,7 @@
 #include <catch2/catch_test_macros.hpp>
 #include <fmt/core.h>
 #include <string>
-#include "sfmlbackend/textures.hpp"
+#include "guecs/sfml/textures.hpp"
 
 using namespace fmt;