Lots of updates:

1. Scrolling and click to set the cursor works.
2. GUI now uses Brass Mono as the font.
3. A lot of stability and other updates.

TerminalFrontend.h

@@ -8,20 +8,24 @@
 #include "TerminalInputHandler.h"
 #include "TerminalRenderer.h"
 
-class TerminalFrontend : public Frontend {
-public:
-    TerminalFrontend() = default;
-    ~TerminalFrontend() override = default;
 
-    bool Init(Editor &ed) override;
-    void Step(Editor &ed, bool &running) override;
-    void Shutdown() override;
+class TerminalFrontend final : public Frontend {
+public:
+	TerminalFrontend() = default;
+
+	~TerminalFrontend() override = default;
+
+	bool Init(Editor &ed) override;
+
+	void Step(Editor &ed, bool &running) override;
+
+	void Shutdown() override;
 
 private:
-    TerminalInputHandler input_{};
-    TerminalRenderer renderer_{};
-    int prev_r_ = 0;
-    int prev_c_ = 0;
+	TerminalInputHandler input_{};
+	TerminalRenderer renderer_{};
+	int prev_r_ = 0;
+	int prev_c_ = 0;
 };
 
 #endif // KTE_TERMINAL_FRONTEND_H