Change response handler interface name

[necessarylion]

Change class name from Handler to ResponseHandlerInterface

[github-actions]

Coverage after merging update-response-handler-interface-name into develop

75.16%

Coverage Report

File	Branches	Funcs	Lines	Uncovered Lines
lib
app.dart	100%	100%	82.50%	..., 70, 71, 92, 93
lib/cache
cache.dart	100%	100%	80.95%	10, 23, 24, 9
cache_driver_interface.dart	100%	100%	0%	..., 20, 24, 6, 8
lib/cache/drivers/file
file_cache_driver.dart	100%	100%	93.62%	25, 27, 76
lib/env
env.dart	100%	100%	100%
lib/exception
http_exception.dart	100%	100%	100%
internal_error_exception.dart	100%	100%	100%
not_found_exception.dart	100%	100%	100%
query_exception.dart	100%	100%	100%
unauthorized_exception.dart	100%	100%	100%
validation_exception.dart	100%	100%	100%
lib/http
http_controller_handler.dart	100%	100%	89.47%	18, 23, 25, 30
http_cors_handler.dart	100%	100%	87.50%	29, 41
http_error_handler.dart	100%	100%	0%	10, 6, 7, 8
http_response_handler.dart	100%	100%	80%	30, 31, 53, 54
http_request_handler.dart	100%	100%	72.73%	..., 30, 31, 40, 45
http_route_handler.dart	100%	100%	83.78%	..., 21, 22, 33, 34
http_websocket_handler.dart	100%	100%	77.78%	16, 19
lib/http/request
form_request.dart	100%	100%	13.95%	..., 92, 93, 97, 98
dox_request.dart	100%	100%	57.89%	..., 234, 235, 237, 85
request_file.dart	100%	100%	0%	..., 48, 49, 50, 7
http_request_body.dart	100%	100%	76.92%	14, 15, 16
form_data_visitor.dart	100%	100%	0%	..., 75, 78, 79, 82
lib/http/response
dox_cookie.dart	100%	100%	100%
dox_response.dart	100%	100%	100%
serializer.dart	100%	100%	86.67%	18, 19
lib/interfaces
router.dart	100%	100%	50%	2
app_config.dart	100%	100%	25%	..., 31, 32, 35, 37
auth.dart	100%	100%	0%	14, 26, 5, 7
dox_service.dart	100%	100%	0%	4
lib/ioc
ioc_container.dart	100%	100%	100%
lib/multi_thread
multi_thread.dart	100%	100%	100%
multi_thread_interfaces.dart	100%	100%	100%
multi_thread_isolate_handler.dart	100%	100%	93.33%	27
lib/router
route.dart	100%	100%	89.42%	..., 94, 95, 96, 99
route_data.dart	100%	100%	100%
lib/server
dox_server.dart	100%	100%	93.75%	32
lib/utils
aes_encryptor.dart	100%	100%	100%
extensions.dart	100%	100%	100%
hash.dart	100%	100%	100%
utils.dart	100%	100%	100%
logger.dart	100%	100%	25%	..., 48, 5, 51, 6
lib/validation
dox_validator.dart	100%	100%	93.02%	102, 33, 38
nested_validation_visitor.dart	100%	100%	100%
validation_item.dart	100%	100%	100%
validation_rules.dart	100%	100%	78.57%	..., 286, 95, 97, 98
lib/websocket
socket_emitter.dart	100%	100%	6.25%	..., 56, 57, 59, 60
dox_websocket.dart	100%	100%	88%	56, 62, 63
socket_storage.dart	100%	100%	89.29%	60, 69, 70
web_socket_info.dart	100%	100%	100%