Add Reshade ImGui widgets building

includes/ImGuiWidgets.h

@@ -0,0 +1,136 @@
+#pragma once
+#include <variant>
+#include "GameFixes.h"
+#include <imgui.h>
+
+// --- Must be defined before inclusion ---
+//struct GameFixes;
+extern void SaveSettings();
+extern void SetFixesEnabled(GameFixes fix, bool value);
+
+// Checkboxes
+struct FixToggle
+{
+    const char* label;
+    bool* value;
+    GameFixes   fix;
+    const char* tooltip = nullptr;
+};
+
+/**
+ * @brief Draws an ImGui checkbox to enable or disable a game fix.
+ * @param Checkbox A Checkbox structure containing:\n
+ *   
+ * - label:  The text displayed next to the checkbox.
+ * 
+ * - value:  Pointer to the boolean controlling the fix state.
+ * 
+ * - fix:        Identifier of the fix to enable or disable.
+ * 
+ * - tooltip:    Optional tooltip text shown on hover (may be nullptr).
+ * 
+ * @note The fix is applied only when the checkbox state is modified by ImGui.
+ *       Programmatic changes to the bound value must trigger fix application
+ *       logic elsewhere.
+ */
+static void DrawFixCheckbox(const FixToggle& Checkbox)
+{
+    if (ImGui::Checkbox(Checkbox.label, Checkbox.value)) {
+        if (SetFixesEnabled) SetFixesEnabled(Checkbox.fix, *Checkbox.value);
+        SaveSettings();
+    }
+
+    if (Checkbox.tooltip && ImGui::IsItemHovered()) {
+        ImGui::BeginTooltip();
+        ImGui::TextUnformatted(Checkbox.tooltip);
+        ImGui::EndTooltip();
+    }
+}
+
+// Sliders
+enum class SliderType
+{
+    Int,
+    Float
+};
+
+using ApplyFn = std::variant<
+    std::monostate,
+    void (*)(int),
+    void (*)(float)
+>;
+
+struct SliderFix {
+    const char* collapsiblelabel;
+    const char* label;
+    SliderType  type;
+    void* value;
+    float min;
+    float max;
+    ApplyFn apply;
+    const char* format = nullptr;
+    const char* tooltip = nullptr;
+};
+
+/**
+ * @brief Draws an ImGui slider to adjust a game fix value.
+ * @param slider A SliderFix structure containing:\n
+ *
+ * - collapsiblelabel: Optional label for a collapsible section containing this slider.
+ *
+ * - label:            The text displayed next to the slider.
+ *
+ * - type:             Type of slider (e.g., float, int, etc.).
+ *
+ * - value:            Pointer to the value being modified.
+ *
+ * - min:              Minimum value of the slider.
+ *
+ * - max:              Maximum value of the slider.
+ *
+ * - apply:            Function called when the slider value changes.
+ *
+ * - format:           Optional format string for displaying the value (eg %.2f or nullptr).
+ *
+ * - tooltip:          Optional tooltip text shown on hover (may be nullptr).
+ *
+ * @param width The width of the slider in ImGui units.
+ *
+ * @note The fix is applied only when the slider value changes via ImGui.
+ *       Programmatic changes to the bound value must trigger fix application
+ *       logic elsewhere.
+ */
+static void DrawSlider(const SliderFix& slider, float width)
+{
+    if (ImGui::CollapsingHeader(slider.collapsiblelabel, ImGuiTreeNodeFlags_DefaultOpen)) {
+        ImGui::SetNextItemWidth(width);
+        bool changed = false;
+
+        if (slider.type == SliderType::Int) {
+            int* v = static_cast<int*>(slider.value);
+            changed = ImGui::SliderInt(slider.label, v, static_cast<int>(slider.min), static_cast<int>(slider.max));
+
+            if (changed && std::holds_alternative<void (*)(int)>(slider.apply)) {
+                auto fn = std::get<void (*)(int)>(slider.apply);
+                fn(*v);
+            }
+        }
+        else {
+            float* v = static_cast<float*>(slider.value);
+            changed = ImGui::SliderFloat(slider.label, v, slider.min, slider.max, slider.format ? slider.format : "%.2f");
+
+            if (changed && std::holds_alternative<void (*)(float)>(slider.apply)) {
+                auto fn = std::get<void (*)(float)>(slider.apply);
+                fn(*v);
+            }
+        }
+
+        if (changed) SaveSettings();
+
+        if (slider.tooltip && ImGui::IsItemHovered()) {
+            ImGui::BeginTooltip();
+            ImGui::TextUnformatted(slider.tooltip);
+            ImGui::EndTooltip();
+        }
+    }
+}