Add slot_map and begin ui context

.gitmodules

@@ -19,3 +19,6 @@
 [submodule "Zelda64RecompSyms"]
 	path = Zelda64RecompSyms
 	url = https://github.com/Zelda64Recomp/Zelda64RecompSyms
+[submodule "lib/slot_map"]
+	path = lib/slot_map
+	url = https://github.com/SergeyMakeev/slot_map

CMakeLists.txt

@@ -172,6 +172,7 @@ set (SOURCES
     ${CMAKE_SOURCE_DIR}/src/ui/ui_mod_details_panel.cpp
     ${CMAKE_SOURCE_DIR}/src/ui/ui_mod_menu.cpp
     ${CMAKE_SOURCE_DIR}/src/ui/util/hsv.cpp
+    ${CMAKE_SOURCE_DIR}/src/ui/core/ui_context.cpp
     ${CMAKE_SOURCE_DIR}/src/ui/elements/ElementConfigGroup.cpp
     ${CMAKE_SOURCE_DIR}/src/ui/elements/ElementConfigOption.cpp
     ${CMAKE_SOURCE_DIR}/src/ui/elements/ElementDescription.cpp
@@ -218,6 +219,7 @@ target_include_directories(Zelda64Recompiled PRIVATE
     ${CMAKE_SOURCE_DIR}/lib/rt64/src/render
     ${CMAKE_SOURCE_DIR}/lib/freetype-windows-binaries/include
     ${CMAKE_SOURCE_DIR}/lib/rt64/src/contrib/nativefiledialog-extended/src/include
+    ${CMAKE_SOURCE_DIR}/lib/slot_map/slot_map
     ${CMAKE_BINARY_DIR}/shaders
     ${CMAKE_CURRENT_BINARY_DIR}
 )

src/ui/core/ui_context.cpp

@@ -0,0 +1,3 @@
+#include "slot_map.h"
+
+#include "ui_context.hpp"

src/ui/core/ui_context.hpp

@@ -0,0 +1,8 @@
+#pragma once
+
+#include "../elements/ui_element.h"
+
+namespace recompui {
+
+} // namespace recompui
+