feat: add gen api @doc comment to logic handler routes

[ch3nnn]

example:

demo.api

syntax = "v1"

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

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

service demo-api {

	@doc "demo comment"
	@handler DemoHandler
	get /from/:name(Request) returns (Response)

	@doc ("demo list comment")
	@handler DemoListHandler
	get /from/list returns (Response)

	@doc(
		summary: "comment comment comment"
	)
	@handler NoResponseHandler
	get /from/get (Request)
}

generate logic handler routes comment

[ch3nnn]

@kevwan I hope you can help me see if this change is reasonable and correct. thank!

[kesonan]

LGTM

[ch3nnn]

i see change approved, want to know the current PR can be merged ? @kevwan

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.14%. Comparing base (2629636) to head (7e31aa9).
Report is 40 commits behind head on master.

Additional details and impacted files

see 253 files with indirect coverage changes