Added rendering stuff, updated go mod

internal/renderer/user_inputs.go

@@ -0,0 +1,25 @@
+package renderer
+
+type UiAction rune
+
+const (
+	Unknown    UiAction = iota
+	Quit       UiAction = 81 // 'Q'
+	Left       UiAction = 65
+	Up         UiAction = 87
+	Right      UiAction = 68
+	Down       UiAction = 83
+	LeftArrow  UiAction = 8592
+	UpArrow    UiAction = 8593
+	RightArrow UiAction = 8594
+	DownArrow  UiAction = 8595
+)
+
+func ProcessInput(rawInput rune) (action UiAction) {
+	inputVal := int(rawInput)
+	// Convert to UpperCase
+	if inputVal >= 97 && inputVal <= 122 {
+		inputVal = inputVal - 32
+	}
+	return UiAction(inputVal)
+}