♻️ refactor: organize BDD steps by domain with JWT implementation

- Split steps into domain-specific files:

  - greet_steps.go: Greet API steps

  - health_steps.go: Health check steps

  - auth_steps.go: Authentication steps with full JWT implementation

  - common_steps.go: Shared validation steps

- Add comprehensive README.md for steps organization

- Implement all TODO items in auth_steps:

  - JWT claims verification for admin

  - JWT token validation and parsing

  - User ID extraction from tokens

  - Token comparison for consecutive authentications

- Update main steps.go to register all domain steps

Generated by Mistral Vibe.

Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

pkg/bdd/steps/health_steps.go

@@ -0,0 +1,24 @@
+package steps
+
+import (
+	"dance-lessons-coach/pkg/bdd/testserver"
+)
+
+// HealthSteps holds health-related step definitions
+type HealthSteps struct {
+	client *testserver.Client
+}
+
+func NewHealthSteps(client *testserver.Client) *HealthSteps {
+	return &HealthSteps{client: client}
+}
+
+// Health-related steps
+func (s *HealthSteps) iRequestTheHealthEndpoint() error {
+	return s.client.Request("GET", "/api/health", nil)
+}
+
+func (s *HealthSteps) theServerIsRunning() error {
+	// Actually verify the server is running by checking the readiness endpoint
+	return s.client.Request("GET", "/api/ready", nil)
+}