Add editor packages

internal/editor/canvas/canvas.go

@@ -0,0 +1,33 @@
+package canvas
+
+import (
+	"bytes"
+	"log/slog"
+	"os"
+	"sync"
+
+	"code.chimeric.al/dwrz/wen/pkg/terminal"
+)
+
+type Canvas struct {
+	log      *slog.Logger
+	out      *os.File
+	terminal *terminal.Terminal
+
+	mu  sync.Mutex
+	buf bytes.Buffer
+}
+
+type Parameters struct {
+	Log      *slog.Logger
+	Out      *os.File
+	Terminal *terminal.Terminal
+}
+
+func New(p Parameters) *Canvas {
+	return &Canvas{
+		log:      p.Log,
+		out:      p.Out,
+		terminal: p.Terminal,
+	}
+}