refactor: better project structure (#35)

This project is starting to grow, and I've seen flaws in the initial
project structure design
I think I'll restructure the entire project directory for better
scalability and also cleaner

integration/cursor_test.go

@@ -0,0 +1,48 @@
+package integration
+
+import (
+	"testing"
+)
+
+func TestComputeCursorCol(t *testing.T) {
+	tests := []struct {
+		name string
+		data []byte
+		want int
+	}{
+		{
+			name: "Simple prompt",
+			data: []byte("λ "),
+			want: 2,
+		},
+		{
+			name: "ANSI color prompt",
+			data: []byte("\033[32mλ \033[0m"),
+			want: 2,
+		},
+		{
+			name: "Carriage return and move right",
+			data: []byte("λ \033[140G...22 chars right prompt...\r\033[2C"),
+			want: 2,
+		},
+		{
+			name: "OSC sequence before prompt",
+			data: []byte("\033]0;iris on fix/menu-debouncing\007λ "),
+			want: 2,
+		},
+		{
+			name: "CSI Horizontal Absolute",
+			data: []byte("abc\033[10Gde"),
+			want: 11,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := ComputeCursorCol(tt.data)
+			if got != tt.want {
+				t.Errorf("ComputeCursorCol(%q) = %d, want %d", tt.data, got, tt.want)
+			}
+		})
+	}
+}