Add Input functionality to Ultra

- Add point InSpace check to PD::Li::Math
- Add Universal AlignmentCenter flag for Horizontal and and Vertical Alignment
-  Add Fallbackfont to Layout (if you dont want to set font per object)
- Add Button Object WIP
- Rename OnHover to OnFocus and add OnUnfocus
- Move font and FontScale to ElementBase (for fallback logic etc)
- Add UpdateInput func to ElementBase
- Corectly Set fontScale in Text Rendering
- Update ecample

include/pd/ultra/elems/button.hpp

@@ -0,0 +1,56 @@
+#pragma once
+
+#include <pd/core/core.hpp>
+#include <pd/ultra/elems/element.hpp>
+
+namespace PD {
+namespace Ultra {
+class PD_API Button : public ElementBase {
+ public:
+  Button() {}
+  Button(const PD::fvec2& pos, const PD::fvec2& size, const PD::Color& color,
+         float rounding = 0.f, UltraAlignment align = 0)
+      : pColor(color), pRounding(rounding) {
+    this->pAlignment = align;
+    this->pPos = pos;
+    this->pSize = size;
+  }
+  Button(float x, float y, float w, float h, const PD::Color& color,
+         float rounding = 0.f, UltraAlignment align = 0)
+      : pColor(color), pRounding(rounding) {
+    this->pAlignment = align;
+    this->pPos = PD::fvec2(x, y);
+    this->pSize = PD::fvec2(w, h);
+  }
+  ~Button() {}
+
+  void Draw(PD::Li::Drawlist& l) override;
+  void Update() override;
+  void SetColor(const PD::Color& color) { pColor = color; }
+  void SetFocusedColor(const PD::Color& color) { pHovered = color; }
+  void SetTextColor(const PD::Color& color) { pTextColor = color; }
+  void SetRounding(float r) { pRounding = r; }
+  void SetLined(bool v) { pLined = v; }
+  void SetThickness(int v) { pThickness = v; }
+  void SetText(const std::string& text) { pText = text; }
+  void SetAutoSizePadding(const PD::fvec2& size) { pAsp = size; }
+
+  // Discard these funcs
+  void OnFocus(EventFunc func) override {}
+  void OnUnFocus(EventFunc func) override {}
+
+ private:
+  std::string pText;
+  PD::Color pRenderColor;
+  PD::Color pColor;
+  PD::Color pHovered;
+  PD::Color pTextColor;
+  float pRounding = 0.f;
+  bool pLined = false;
+  int pThickness = 1.f;
+  // Auto-Size-Padding
+  PD::fvec2 pAsp = PD::fvec2(30, 10);
+};
+}  // namespace Ultra
+
+}  // namespace PD