feat: support multiple extract token key

[ch3nnn]

Implement support for multiple custom token keys and simplify the JWT authentication configuration. WithTokenLookups function enables setting token keys, improving the authentication process by accommodating various token header extraction strategies. by accommodating various token header extraction strategies.

example:

jwt-api.api

syntax = "v1"


type Request {
	Name string `path:"name,options=you|me"`
}

type Response {
	Message string `json:"message"`
}

type FormExampleReq {
	Name string `form:"name,options=you|me"`
}

@server(
	jwt: Auth
	jwtTransition: Trans
)
service A-api {
	@handler GreetHandler
	get /greet/from/:name(Request) returns (Response)

	@handler FormExample
	post /form/example (FormExampleReq) returns (Response)
}

a-api.yaml

Name: A-api
Host: 0.0.0.0
Port: 8888

Auth:
  AccessSecret: xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
  AccessExpire: 604800
  TokenLookup:
    - "header:Token"
    - "query:Token"
    - "form:Token"



Trans:
  Secret: xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
  PrevSecret: xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
  TokenLookup:
    - "header:Token"
    - "query:Token"
    - "form:Token"

TokenLookup extract a jwt from custom request header or post form or get url arguments.