feat: auth middleware + /me endpoint

internal/api/routes/auth.go

@@ -33,4 +33,9 @@ func RegisterAuthRoutes(cfg *types.StereoConfig, api *gin.RouterGroup) {
 
 		c.String(http.StatusOK, jwt)
 	})
+
+	api.GET("/auth/me", auth.JwtMiddleware(cfg.JWTSecret), func(c *gin.Context) {
+        claims, _ := c.Get("claims")
+		c.JSON(http.StatusOK, claims)
+	})
 }