Add runtime abstraction and agent loop

Co-authored-by: codegirl007 <codegirl-007@users.noreply.github.com>

agentbox/internal/agent/deterministic.go

@@ -0,0 +1,42 @@
+package agent
+
+import (
+	"context"
+	"time"
+
+	"agentbox/internal/environment"
+)
+
+type Deterministic struct {
+	next int
+}
+
+func (a *Deterministic) Name() string {
+	return "deterministic-right"
+}
+
+func (a *Deterministic) NextAction(
+	_ context.Context,
+	_ string,
+	_ []Step,
+	_ Observation,
+) (Decision, error) {
+	var decision Decision
+	switch a.next {
+	case 0:
+		action := environment.InputAction{Type: environment.KeyDown, Key: "RIGHT"}
+		decision = Decision{Reason: "Press RIGHT to start moving.", Action: &action}
+	case 1:
+		action := environment.InputAction{Type: environment.Wait, Duration: time.Second}
+		decision = Decision{Reason: "Keep RIGHT held for one second.", Action: &action}
+	case 2:
+		action := environment.InputAction{Type: environment.KeyUp, Key: "RIGHT"}
+		decision = Decision{Reason: "Release RIGHT after the movement.", Action: &action}
+	default:
+		decision = Decision{Reason: "The movement sequence is complete.", Done: true}
+	}
+	a.next++
+	return decision, nil
+}
+
+var _ Agent = (*Deterministic)(nil)