feat: config for html title

[link-duan]

Describe the PR
config for html title

[ubogdan]

I guess there is no open issue for this.
Before you follow the requested changes please describe your use case so we can better understand the need.

[codecov]

Codecov Report

Merging #180 (49630de) into master (301224e) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #180   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines           87        91    +4     
=========================================
+ Hits            87        91    +4     

Impacted Files	Coverage Δ
swagger.go	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 301224e...49630de. Read the comment docs.

[ubogdan]

LGTM

[ubogdan]

Can you please give us some insights regarding the use case?

[link-duan]

Can you please give us some insights regarding the use case?

The title of swagger web page (/swagger/index.html) is "Swagger UI".
If we open multiple "Swagger UI" pages, it's hard to find the one we want from browser tabs.
So I think it's a good idea to support the customization of page title.