Go to declaration opens NGINX documentation

[WileESpaghetti]

I'd like to be able to use the IDE's "Go to declaration" functionality with NGINX directives.

I should be able to ctrl+ click on something like add_header and then have it open up the documentation for the directive (https://nginx.org/en/docs/http/ngx_http_headers_module.html#add_header) either in the editor or in a web browser.